( 3 x X - 16 ) x 6 = 2 x 42
( 3 x X - 16 ) x 6 = 84
3 x X - 16 = 14
3 x X = 30
X = 10
Vậy : X = 10
(3×x-16)×6=84
(3×x-16)=84:6
(3×x-16)=14
3x=14+16
3x=30
x=30:3
x=10
vậy x=10
Bài làm
\(\left(3x-16\right)6=2.42\Leftrightarrow18x-96=84\)
\(\Leftrightarrow18x=180\Leftrightarrow x=10\)
@Hoc tot@