6 класс математика срочно

333

1. 11 + 5x = 55 + 3x 2x = 44 x = 22 2. -8x - 17 = 3x - 105 -11x = -88 x = 8 3. 2(2 + y) = 19 - 3y 4 + 2y = 19 - 3y 5y = 15 y = 3 4. -3(3b + 1) - 12 = 12 -9b - 3 - 12 = 12 -9b = 27 b = -3 5. -2(2 - 5x) = 2(x - 3) - 5 -4 + 10x = 2x - 6 - 5 8x = -3 x = -3/8 6. -4.92y - (0.08y + 5.12) = -0.88 - y -4.92y - 0.08y - 5.12 = -0.88 - y -4.84y = 4.24 y = -0.875