Question

I dont get these like could someone put the answer and explain?

Answer 1

x = 16

x = 5

Explanation:

1.) We know the sum of two equations are equal to 180

(x + 12) + (9x + 8) = 180

combine like terms

10x + 20 = 180 ----> 10x = 160 ---> x = 16

2.) 17x + 19x = 180

combine like terms

36x = 180

divide by 36

x = 5