а) -0,4x + 0,84x - 33,6хб) m + 2n - 7 + 2m + 5n - 8
Решение уравнений:а) 2(5-3x) = 6-5x10 - 6x = 6 - 5x-x = -4x = 4
б) 2(1-x) - 4(2x+8) = 8x + 282 - 2x - 8x - 32 = 8x + 28-10x - 30 = 8x + 28-10x = 8x + 58-18x = 58x = -58/18x = -29/9
а) -0,4x + 0,84x - 33,6х
б) m + 2n - 7 + 2m + 5n - 8
Решение уравнений:
а) 2(5-3x) = 6-5x
10 - 6x = 6 - 5x
-x = -4
x = 4
б) 2(1-x) - 4(2x+8) = 8x + 28
2 - 2x - 8x - 32 = 8x + 28
-10x - 30 = 8x + 28
-10x = 8x + 58
-18x = 58
x = -58/18
x = -29/9