Помогите 8 с решением плиз
1) *** **** 2) **** 3) *** 4)
1) 2(x - 5) - 12 = 3(1 - x) 2x - 10 - 12 = 3 - 3x 2x + 3x = 10 + 12 + 3 5x = 25 x = 5 2) x - 10 = 5(2x + 1) + 57 x - 10 = 10x + 5 + 57 -10 - 5 - 57 = 10x - x -72 = 9x x = -8 3) 3(x - 5) + 10(x - 8) = 30 3x - 15 + 10x - 80 = 30 3x + 10x = 30 + 80 + 15 13x = 125 x = x = 9 4) 2(x + 1) + 3(x - 2) = 24 2x + 2 + 3x - 6 = 24 2x + 3x = 24 + 6 - 2 5x = 28 x = x = 5