Решите уравнения: А)4x-20=0 Б)3x-5=4x+1 В)2(x+7)=9-2x
4X - 20 = 0 4X = 20 X = 5 ----------- 3X - 5 = 4X + 1 4X - 3X = - 5 - 1 X = - 6 ------------ 2 *( X + 7 ) = 9 - 2X 2X + 14 = 9 - 2X 2X + 2X = 9 - 14 4X = - 5 X = - 1,25