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\(410-\left(5.x+42.x+x.3\right)=60\)
\(\Leftrightarrow\left(5.x+42.x+3.x\right)=410-60\)
\(\Leftrightarrow5.x+42.x+3.x=350\)
\(\Leftrightarrow\left(5+42+3\right).x=350\)
\(\Leftrightarrow50x=350\)
\(\Leftrightarrow x=350:50\)
\(\Leftrightarrow x=7\)
Vậy \(x=7.\)
\(410-\left(5x+42x+3x\right)=60\)
\(410-50x=60\)
\(50x=410-60\)
\(50x=350\)
\(x=7\)
\(\Rightarrow x:\left(0,2+0,5+0,25+0,125\right)=5,7\)
\(\Rightarrow x:1,075=5,7\)
\(\Rightarrow x=5,7.1,075=6,1275\)
x:(0,2+0,5) + (0,25+0,125)=5,7
x:0,7 + 0,375 = 5,7
x:1,075 = 5,7
x=5,7 X 1,075
x=6,1275
\(a,\left(x+\frac{1}{2}\right)+\left(x+\frac{1}{4}\right)+\left(x+\frac{1}{8}\right)+\left(x+\frac{1}{16}\right)=1\)
\(\Leftrightarrow x+\frac{1}{2}+x+\frac{1}{4}+x+\frac{1}{8}+x+\frac{1}{16}=1\)
\(\Leftrightarrow\left(x+x+x+x\right)+\left(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}\right)=1\)
\(\Leftrightarrow4\times x+\frac{15}{16}=1\)
\(\Leftrightarrow4\times x=1-\frac{15}{16}\)
\(\Leftrightarrow4\times x=\frac{1}{16}\)
\(\Leftrightarrow x=\frac{1}{16}\div4\)
\(\Leftrightarrow x=\frac{1}{64}\)
\(b,x-\frac{20}{11.13}-\frac{20}{13.15}-...-\frac{20}{53.55}=\frac{3}{11}\)
\(\Leftrightarrow x-\left(\frac{20}{11.13}+\frac{20}{13.15}+...+\frac{20}{53.55}\right)=\frac{3}{11}\)
\(\Leftrightarrow x-\left[715\times\left(\frac{1}{11}-\frac{1}{13}-\frac{1}{13}+...+\frac{1}{55}\right)\right]=\frac{3}{11}\)
\(\Leftrightarrow x-\left[715\times\left(\frac{1}{11}-\frac{1}{55}\right)\right]=\frac{3}{11}\)
\(\Leftrightarrow x-\left[715\times\frac{4}{55}\right]=\frac{3}{11}\)
\(\Leftrightarrow x-52=\frac{3}{11}\)
\(\Leftrightarrow x=\frac{3}{11}+52\)
\(\Leftrightarrow x=\frac{575}{11}\)
\(x\div10+x\times3,9=4,8\)
\(\Rightarrow x\times\frac{1}{10}+x\times3,9=4,8\)
\(\Rightarrow x\times\left(\frac{1}{10}+3,9\right)=4,8\)
\(\Rightarrow x\times4=4,8\)
\(\Rightarrow x=4,8\div4\)
\(\Rightarrow x=1,2\)
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x – x : 0,2 + x : 0,125 + x = 3,25
x . 1 – x . 5 + x . 8 + x . 1 = 3,25
x . ( 1 - 5 + 8 + 1 ) = 3,25
x . 5 = 3,25
x = 3,25 : 5
x = 0,65
a) x : 0,125 - x = 45
x * 1/8 - x = 45
x * (1/8 - 1) = 45
x * -7/8 = 45
x = -360/7
b) x : 0,2 + x * 5 - x : 0,25 = 54,75
x * 1/5 + x * 5 - x * 1/4 = 54,75
x * (1/5 + 5 - 1/4) = 54,75
x * 99/20 = 54,75
x = 365/33
X = 0
Y = 6
4 x X + X x Y + y
= 4 x 0 + 0 x 6 + 6
= 0 + 0 + 6
= 6
( 6x - 18 ) : 3 + 25 . 2 = 78
( 6x - 18 ) : 3 + 50 = 78
( 6x - 18 ) : 3 = 78 - 50
( 6x - 18 ) : 3 = 28
( 6x - 18 ) = 28 . 3
( 6x - 18 ) = 84
6x = 84 + 18
6x = 102
x = 102 : 6
x = 17
Vậy x = 17
\(x:0,2+x:0,125-x\cdot3=78\)
\(=>x:\left(0,2:0,125\cdot3\right)=78\)
\(=>x:4,8=78\)
\(=>x=374,4\)
\(\cdot\)là nhân nha
ti ck mik cầu xin đó
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\(x:0,2+x:0,125-x3=78\)
\(x.5+x.8-x.3=78\)
\(x\left(5+8-3\right)=78\)
\(x.10=78\)
\(\Leftrightarrow x=7,8\)