Question

ПОМОГИТЕ 15z+14=14z-9
17-8y=4y-7
30-15z=40-14z
11m-13=15-3m
28=7n-7
8y-15=7y-12
-8x+65=-3x

Answer 1

$15z + 14 = 14z - 9 \\ 15z - 14z = - 9 - 14 \\ z = - 23$

$17 - 8y = 4y - 7 \\ - 8y - 4y = - 7 - 17 \\ - 12y = - 24 \\ y = 2$

$30 - 15z = 40 - 14z \\ - 15z + 14z = 40 - 30 \\ - z = 10 \\ z = - 10$

$11m - 13 = 15 - 3m \\ 11m + 3m = 15 + 13 \\ 14m = 28 \\ m = 2$

$28 = 7n - 7 \\ - 7n = - 7 - 28 \\ - 7n = - 35 \\ n = 5$

$8y - 15 = 7y - 12 \\ 8y -7y = - 12 + 15 \\ - y = 3 \\ y = - 3$

$- 8x + 65 = - 3x \\ - 8x + 3x = - 65 \\ - 5x = - 65 \\ x = 13$