Question

Как решить 12×(97- z)=240

Answer 1

$12 \times (97 - z) = 240 \\ 97 - z = 240 \div 12 \\ 97 - z =20 \\ z = 97 - 20 \\ z = 77$

Answer 2

12*(97-z)=240

97-z=240:12

97-z=20

z=97-20

z=77