Question

7 . x - x = 18  và 32 - x - 18 = 30 × 2

Giúp  với cảm ơn nhé 

Answer 1

\(7x-x=18\)\(\Leftrightarrow6x=18\)\(\Leftrightarrow x=3\)

\(32-x-18=30\cdot2\)

\(\Leftrightarrow-x=60-32+18\)

\(\Leftrightarrow-x=46\Leftrightarrow x=-46\)

Answer 2

7x-x=18

=>6x=18

=>x=18:6

=>x=3

Answer 3

32-x-18=30.2

32-x-18=60

32-x=60+18

32-x=78

x=32-78

x=-46