4 (x + 2) = x - 7 4x + 8 = x - 7 4x - x = - 8 - 7 3x = - 15 x = -15 / 3 x = - 5 ******************************** 2 (3x - 4) = x + 22 6x - 8 = x + 22 6x - x = 22 + 8 5x = 30 x = 30 : 5 x = 6 ****************************** 4 (x-3) = 2 (x - 7) 4x - 12 = 2x - 14 4x - 2x = - 14 + 12 2x = -2 х = (-2) : 2 x = -1
Спасибо огромное) А вот 2 уравнение?
4(x+2)=x-7 4x+8=x-7 4x-x=-8-7 3x=-15 x=-15 / 3 x=-5 5(x-2)=3x-4 5x-10=3x-4 2x=6 x=3 2(3x-4)=x+22 6x-8=x+22 6x-x=22+8 5x=30 x=30/5 x=6 4(x-3)=2(x-7) 4x-12=2x-14 4x-2x=-14+12 2x=-2 x=-1