Решить уравнение 3(5-2х)+7=3-4х

15-6x+7=3-4x -6x+4x=3-7-15 -2x=-19 x=-19:(-2) x=9.5

3*(5-2*x)+7 = 3-4*x 3*5-3*2*x+7 = 3-4*x 22 - 6*x = 3-4*x -6*x = -19 - 4*x -2*x = -19  -2x = -19 / (-2)  x = 19/2