a) $\frac{-12}{13}$ .x-5= $\frac{79}{13}$ b) $\frac{3}{4}$ -(x+ $\frac{1}{2}$ )= $\frac{4}{5}$ 10/09/2021 Bởi Madelyn a) $\frac{-12}{13}$ .x-5= $\frac{79}{13}$ b) $\frac{3}{4}$ -(x+ $\frac{1}{2}$ )= $\frac{4}{5}$
a,$\frac{-12}{13}$ .x-5=$\frac{79}{13}$ $\frac{-12}{13}$ .x =$\frac{79}{13}$ + 5 $\frac{-12}{13}$ .x =$\frac{144}{13}$ x = $\frac{144}{13}$ :$\frac{-12}{13}$ x =-12 Vậy x=-12 b.$\frac{3}{4}$ -(x+$\frac{1}{2}$ )=$\frac{4}{5}$ x+$\frac{1}{2}$ =$\frac{3}{4}$ -$\frac{4}{5}$ ) x+$\frac{1}{2}$ = $\frac{-1}{20}$ x = $\frac{-1}{20}$ – $\frac{1}{2}$ x = $\frac{-11}{20}$ Vậy x=$\frac{-11}{20}$ CHÚC BẠN HỌC TỐT!!! Bình luận
a) $\frac{-12}{13}$x – 5 = $\frac{79}{13}$ ⇔ $\frac{-12}{13}$x= $\frac{144}{13}$ ⇔ x = $\frac{144}{13}$ : $\frac{-12}{13}$ ⇔ x = -12 b) $\frac{3}{4}$- (x + $\frac{1}{2}$) = $\frac{4}{5}$ ⇔ $\frac{3}{4}$- x – $\frac{1}{2}$ = $\frac{4}{5}$ ⇔ -x = $\frac{4}{5}$ – $\frac{3}{4}$ + $\frac{1}{2}$ ⇔ x = $\frac{-11}{20}$ Bình luận
a,$\frac{-12}{13}$ .x-5=$\frac{79}{13}$
$\frac{-12}{13}$ .x =$\frac{79}{13}$ + 5
$\frac{-12}{13}$ .x =$\frac{144}{13}$
x = $\frac{144}{13}$ :$\frac{-12}{13}$
x =-12
Vậy x=-12
b.$\frac{3}{4}$ -(x+$\frac{1}{2}$ )=$\frac{4}{5}$
x+$\frac{1}{2}$ =$\frac{3}{4}$ -$\frac{4}{5}$ )
x+$\frac{1}{2}$ = $\frac{-1}{20}$
x = $\frac{-1}{20}$ – $\frac{1}{2}$
x = $\frac{-11}{20}$
Vậy x=$\frac{-11}{20}$
CHÚC BẠN HỌC TỐT!!!
a) $\frac{-12}{13}$x – 5 = $\frac{79}{13}$
⇔ $\frac{-12}{13}$x= $\frac{144}{13}$
⇔ x = $\frac{144}{13}$ : $\frac{-12}{13}$
⇔ x = -12
b) $\frac{3}{4}$- (x + $\frac{1}{2}$) = $\frac{4}{5}$
⇔ $\frac{3}{4}$- x – $\frac{1}{2}$ = $\frac{4}{5}$
⇔ -x = $\frac{4}{5}$ – $\frac{3}{4}$ + $\frac{1}{2}$
⇔ x = $\frac{-11}{20}$