1) -3x + 10x = -15 - 7x = -15 - 7x = -2x = -21 / x = -3
2) 7x - 5x = 17 - 32x = -1x = -18 / x = -9
3) 5x - 7x = -35 + 3-2x = x = 2 / -x = -1
4) -2x - 11x = -45 + 3-13x = -x = -8 / -1x ≈ 0.615
5) 2a - 2(a - 72a - 2a + 114
6) -6a + 3(2 - 2a-6a + 6 - 66 - 12a
1) -3x + 10x = -15 -
7x = -15 -
7x = -2
x = -21 /
x = -3
2) 7x - 5x = 17 - 3
2x = -1
x = -18 /
x = -9
3) 5x - 7x = -35 + 3
-2x =
x = 2 / -
x = -1
4) -2x - 11x = -45 + 3
-13x = -
x = -8 / -1
x ≈ 0.615
5) 2a - 2(a - 7
2a - 2a + 1
14
6) -6a + 3(2 - 2a
-6a + 6 - 6
6 - 12a