Решить: -a+36-4a+(7a-26)-176= 12х-4y-6y-(19x+21y+5x-3y)= 2x(1-3y)= (-4-a)(2-1)=

-а+36-4а+(7а-26)-176=-а-4а+7а+36-26-176=2а-166

12х-4у-6у-(19х+21у+5х-3у)=12х-19х-5х-4у-6у-21у+3у=-12х-28у

2х(1-3у)=2х-6ху

(-4-а)(2-1)=1*(-4-а)=-4-а

1) -a + 36 - 4a +(7a - 26) - 176 = -a + 36 - 4a + 7a - 26 - 176 = 2a - 166 = 2(a - 83) 2) 12x - 4y - 6y -(19x + 21y + 5x -3y) = 12x - 4y - 6y - 19x - 21y - 5x + 3y = -12x - 28y = 2(-6x - 14) 3) 2x( 1 - 3y) = 2x - 6xy 4) (-4 - a) (2 - 1) = -8 + 4 -2a + a = -4 - a