Answer: x≈ 14 . 08
Explanation:
Given :
3x - 1 + 9x - 7 + 19 = 180
The first thing is to collect the like term , then we have
3x + 9x - 1 - 7 + 19 = 180
12x + 11 = 180
subtract 11 from both sides
12x = 180 - 11
12x =169
divide through by 12
x = 169/12
x = 14.083333333333
x≈ 14 . 08