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1, 99 x 1 = 99
2, 88 x 2 = 176
3, 7 x 9 x 3 x 6 + 2 = 1136
4, 3x + 9 = 0
3x = 0 - 9
3x = -9
x = ( -9 ) : 3
x = -3
Vậy x = -3
~ Hok tốt ~
\(x+12=29+18+1\)
\(x+12=48\)
\(x=48-12\)
\(x=36\)
\(a\times9+a\times5+a\times4+a\times8+a\)
\(=a\times\left(9+5+4+8+1\right)\)
\(=a\times27\)
x + 12 = 29+18+1
mà 29+18+1=48
suy ra x=48-12
x= 36
ax9+ax5+ax4+ax8+a
=ax27
k mk nha
thankyou
a. \(=\left(\dfrac{12}{15}+\dfrac{3}{15}\right)+\left(\dfrac{4}{3}+\dfrac{5}{3}\right)+\left(\dfrac{1}{4}+\dfrac{3}{4}\right)\\ =1+2+1=4\)
b. \(x\times\dfrac{3}{4}=\dfrac{1\times3\times6\times5}{6\times5\times5\times3}\\ x\times\dfrac{3}{4}=\dfrac{1}{5}\\ x=\dfrac{1}{5}:\dfrac{3}{4}\\ x=\dfrac{4}{15}\)
cau1 x= 1/2 + 3/4
x= 5 / 4
cau2 x = 8 x 1/4
x= 2
cau 3 x= 5/12 - 1/6
x = 1/4
cau 4 x = 4/5 - 1/10
x = 7/10
cau5 x= 2/5 : 1/3
x= 6/5
cau6 x =2/3 : 2/7
x = 7/3
x +\(\frac{1}{6}\)=\(\frac{1}{3}\)-\(\frac{1}{4}\)
x +\(\frac{1}{6}\)=\(\frac{1}{12}\)
x =\(\frac{1}{12}\)-\(\frac{1}{6}\)
x =\(-\frac{1}{12}\)
x -\(\frac{5}{12}\)=\(\frac{1}{3}+\frac{1}{4}\)
x -\(\frac{5}{12}\)=\(\frac{7}{12}\)
x =\(\frac{7}{12}\)+\(\frac{5}{12}\)
x = 1
x +\(\frac{1}{2}\)=\(\frac{4}{5}\)
x =\(\frac{4}{5}\)-\(\frac{1}{2}\)
x =\(\frac{3}{10}\)
x -\(\frac{1}{6}\)=\(\frac{1}{2}\)+\(\frac{1}{3}\)
x -\(\frac{1}{6}\)=\(\frac{5}{6}\)
x =\(\frac{5}{6}\)+\(\frac{1}{6}\)
x = 1
x +\(\frac{1}{8}\)=\(\frac{1}{2}\)-\(\frac{1}{3}\)
x +\(\frac{1}{8}\)=\(\frac{1}{6}\)
x =\(\frac{1}{6}\)-\(\frac{1}{8}\)
x =\(\frac{1}{24}\)
Học tốt!!!
9/12 . x + 1/4 .x = 3/4
(9/12 + 1/4) .x = 3/4
1 .x = 3/4
x = 3/4 : 1
x = 3/4
Trả lời:
\(\frac{9}{12}\cdot x+\frac{1}{4}\cdot x=\frac{3}{4}\)
\(\left(\frac{9}{12}+\frac{1}{4}\right)\cdot x=\frac{3}{4}\)
\(1\cdot x=\frac{3}{4}\)
\(x=\frac{3}{4}:1\)
\(x=\frac{3}{4}\)