3) (200-x)×6=1140 4) (x+30)×110=7700

Question

3) (200-x)×6=1140 4) (x+30)×110=7700

Answer 1

3) 1200-6х=1140
6х=1200-1140
6х=60
х=10
4) 110х+3300=7700
110х=7700-3300
110х=4400
х=40