(0,15 - 3,27)x 3/4 -4/5
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(7,35x-3,27-45,6+3\frac{4}{5}x-\frac{1}{2}=\frac{4}{5}-6,7-7,3x+4\frac{1}{4}x.\)
\(\Leftrightarrow11,15x-49,37=-5,9-3,05x\)
\(\Leftrightarrow11,15x+3,05x=49,37-5,9\)
\(\Leftrightarrow14,2x=43,47\)
\(\Leftrightarrow x=\frac{4347}{1420}\)
Bài ni ,bạn chỉ rút gọn các phân số xong bạn chỉ tính là đc thôi
\(a,-\dfrac{3}{5}-x=-0,75\\ -\dfrac{3}{5}-x=-\dfrac{3}{4}\\ x=-\dfrac{3}{5}-\left(-\dfrac{3}{4}\right)\\ x=-\dfrac{3}{5}+\dfrac{3}{4}=\dfrac{3}{20}\\ ---\\ b,1\dfrac{4}{5}=-0,15-x\\ \dfrac{9}{5}=-\dfrac{3}{20}-x\\ x=-\dfrac{3}{20}-\dfrac{9}{5}\\ x=-\dfrac{3}{20}-\dfrac{36}{20}\\ x=-\dfrac{39}{20}\\ ----\\ c,2\dfrac{1}{2}-x+\dfrac{4}{5}=\dfrac{2}{3}-\left(-\dfrac{4}{7}\right)\\ \dfrac{5}{2}-x+\dfrac{4}{5}=\dfrac{2}{3}+\dfrac{4}{7}\\ \dfrac{33}{10}-x=\dfrac{26}{21}\\ x=\dfrac{33}{10}-\dfrac{26}{21}\\ x=\dfrac{433}{210}\)
(4,578 + 5,232) : 3,27 x 4,08 - 4,08
= 9,81 :3,27 x 4,08 - 4,08
= 3 x4,08 - 4,08
= 12,24 - 4,08
= 8,16
1/2 : 0,5: 1/4 : 0,25 + 1/8 :0,125 - 1/10 : 0,1
= 0,5 ; 0,5 - 0,25 : 0,25 + 0,125 : 0,125 - 0,1 : 0,1
= 1 - 1 + 1 - 1
= 0
(4,578 : 3,27 + 5,232 : 3,27) x 4,08 - 4,08
= [(4,578 + 5,232 ) : 3,27] x 4,08 - 4,08
= (9,81 : 3,27) x 4,08 - 4,08
= 3 x 4,08 - 4,08
= (3 - 1) x 4,08
= 2 x 4,08
= 8,16
1/2 : 0,5 : 1/4 : 0,25 + 1/8 : 0,125 - 1/10 : 0,1
= 1/2 : 1/2 : 1/4 : 1/4 + 1/8 : 1/8 - 1/10 : 1/10
= 16 + 1 - 1
= 17 - 1
= 16
2,68 x 25% + 3,27 x 0,25 + 2,3 x \(\dfrac{1}{4}\) + 1,75:4
2,68 x 0,25 + 3,27 x 0,25 + 2,3 x 0,25 + 1,75 x 0,25
= 0,25 x (2,68 + 3,27 + 2,3 + 1,75)
= 0,25 x [ (2,68 + 3,27 + 1,75) + 2,3]
= 0,25 x [7,7 + 2,3]
= 0,25 x 10
= 2,5
a) \(-\dfrac{3}{5}-x=-0,75\)
\(\Rightarrow-\dfrac{3}{5}-x=-\dfrac{3}{4}\)
\(\Rightarrow x=\dfrac{3}{4}-\dfrac{3}{5}\)
\(\Rightarrow x=\dfrac{15}{20}-\dfrac{12}{20}=\dfrac{8}{20}=\dfrac{2}{5}\)
b) \(1\dfrac{4}{5}=-0,15-x\)
\(\Rightarrow\dfrac{9}{5}=-\dfrac{3}{20}-x\)
\(\Rightarrow x=-\dfrac{3}{20}-\dfrac{9}{5}\)
\(\Rightarrow x=-\dfrac{3}{20}-\dfrac{36}{20}=-\dfrac{39}{20}\)
c) \(x+\dfrac{1}{3}=\dfrac{2}{5}-\left(-\dfrac{1}{3}\right)\)
\(\Rightarrow x+\dfrac{1}{3}=\dfrac{2}{5}+\dfrac{1}{3}\)
\(\Rightarrow x=\dfrac{2}{5}+\dfrac{1}{3}-\dfrac{1}{3}=\dfrac{2}{5}\)
a) \(-\dfrac{3}{5}-x=-0,75\)
\(x=-\dfrac{3}{5}+0,75=\dfrac{3}{5}+\dfrac{3}{4}\)
\(x=\dfrac{27}{20}\)
________
b) \(1\dfrac{4}{5}=-0,15-x\)
\(=>-0,15-x=\dfrac{9}{5}\)
\(x=\dfrac{-3}{20}-\dfrac{9}{5}=\dfrac{-3}{20}-\dfrac{36}{20}\)
\(x=\dfrac{-39}{20}\)
c) \(x+\dfrac{1}{3}=\dfrac{2}{5}-\left(-\dfrac{1}{3}\right)=\dfrac{6}{15}+\dfrac{5}{15}\)
\(x+\dfrac{1}{3}=\dfrac{11}{15}\)
\(x=\dfrac{11}{15}-\dfrac{1}{3}=\dfrac{11}{15}-\dfrac{5}{15}\)
\(x=\dfrac{6}{15}=\dfrac{2}{5}\)
\(a,\Leftrightarrow\dfrac{9}{5}=-\dfrac{3}{20}-x\\ \Leftrightarrow-\dfrac{9}{5}=x+\dfrac{3}{20}\\ \Leftrightarrow x=-\dfrac{9}{5}-\dfrac{3}{20}=-\dfrac{39}{20}\\ b,\Leftrightarrow-x+2x=\dfrac{3}{5}+\dfrac{4}{7}\\ \Leftrightarrow x=\dfrac{41}{35}\\ c,\Leftrightarrow\dfrac{3}{8}-\dfrac{1}{5}+\dfrac{5}{8}-x=\dfrac{1}{5}\\ \Leftrightarrow1-x=\dfrac{2}{5}\\ \Leftrightarrow x=1-\dfrac{2}{5}=\dfrac{3}{5}\)
a) 3/5 x=4/7+1/5; b)(2x-1/2):3=12;
3/5 x=27/35 (2x-1/2)=12x3
x=27/35:3/5 2x-1/2=36
x=9/7 2x=36+1/2
Vay x=9/7 2x=73/2
x=73/2:2
x=73/4
Vay x=73/4
` (254 + 435) + 565 = 254 + ( 435+565)=254+1000=1254.`
`3,27 + 7,45 + 6,73= (3,27+6,73)+7,45= 10+7.45=17,45.`
`5/9 + ( 4/7 + 4/9 )= (5/9+4/9)+4/7=9/9+4/7= 1+4/7=11/7.`
a: =254+1000=1254
b: =3,27+6,73+7,45=10+7,45=17,45
c: =5/9+4/9+4/7=1+4/7=11/7