Question

Someone help me please!

Answer 1

9

Explanation:

3x+15x+18=180

-18. -18

3x+15x=162

18x=162

/18. /18

x=9

Answer 2

Ok: X = 9

Explanation:

We have

3x + (15x + 18) = 180

or

18x+18 = 180

or

18(x+1) = 180

or

x + 1 = 180/18

or

x + 1 = 10

or x = 9.