Question

15) 8х – 10 = 6х + 20
16) 17х -1 = 15 +16х
17) 19 + 3х = 5х – 15
18) 6 +2х = 4х – 30

Answer 1

$15) : : 8x - 10 = 6x + 20 \ 8x - 6x = 20 + 10 \ 2x = 30 \ x = 15 \ \ 16) : : 17x - 1 = 15 + 16x \ 17x - 16x = 15 + 1 \ x = 16 \ \ 17) : : 19 + 3x = 5x - 15 \ 3x - 5x = - 15 - 19 \ - 2x = - 34 \ x = 17 \ \ 18) : : 6 + 2x = 4x - 30 \ 2x - 4x = - 30 - 6 \ - 2x = - 36 \ x = 18$