2x+3x+40=90(x+40)-30=50

Question

2x+3x+40=90
(x+40)-30=50

Answer 1

1)2х+3х=90-40

5х=50

х=10

2)х+40-30=50

х=50-40+30

х=40

Answer 2

5x=50

x=10

 

x+10=50

x=40