Question

1)25x-7x+2x=40
2)33x-16x-4x=78

Answer 1

1) 20х=40
    х=2
 2) 13х=78
     х=6

Answer 2

1)25х-7х+2х=40
20х=40
х=40/20
х=2
2)13х=78
х=78/13
х=6