Question

X + 20 = 50 - 10

Answer 1

X + 20 = 50 - 10

X + 20 = 40

X         = 40 - 20

X         = 20

Answer 2

X + 20 = 50 - 10

X + 20 = 40

X         = 40 - 20

X         = 20

Answer 3

X+20=40

X=40-20

X=20