a. \(\frac{36-x}{18}=12\)
\(\Leftrightarrow36-x=216\)
\(\Leftrightarrow x=36-216=-180\)
Vậy x=-180
b.\(\frac{6x-39}{3}=201\)
\(\Leftrightarrow6x-39=603\)
\(\Leftrightarrow6x=603+39=642\)
\(\Leftrightarrow x=\frac{642}{6}=107\)
Vậy x=107
a, [36-x]:18=12 b, [6x -39]:3 = 201
36-x = 12.18 6x - 39 = 201.3
36-x = 216 6x - 39 = 603
x = 36-216 6x = 603 + 39
x = -180 6x = 642
x = 642:6
x = 107
a, [36-x]:18=12
36-x = 12.18
36-x = 216
x = 36-216
x = -180
b, [6x -39]:3 = 201
6x - 39 = 201.3
6x - 39 = 603
6x = 603 + 39
6x = 642
x = 642:6
x = 107
