Question

Số nguyên x thõa mãn : 150 - x = 42 - (15 - 7)

Answer 1

\(150-x=42-\left(15-7\right)\)

\(\Leftrightarrow150-x=42-15+7\)

\(\Leftrightarrow150-x=34\)

\(\Leftrightarrow x=150-34\)

\(\Leftrightarrow x=116\)

Answer 2

150-x=42-8

150-x=34

       x=150-34=116

Answer 3

150 -x = 42 - ( 15 - 7 )

150 - x = 42 - 8

150 - x = 34

         x = 150 - 34

         x = 116