Question

X+30=3x / 3x-x=30 / 2x=30 / x= 30/2=15

Answer 1

x + 30 = 3x
30 = 3x - x
30 = 2x
2x = 30
x = 30/2
x = 15

Answer 2

1)x-3x=30

-2x=30

x=30/2

x=15

__________

2)3x-x=30

2x=30

x=30/2=15

x=15

_________

3)2x=30

x=30/2=15

x=15

__________

4)x=30

_________

5)2x=15

x=15/2