1) 2(3-x)-(8+x) 2) -4(y+5)+(12-y) 3) -(7-x)+4(x-5) 4) -9(y-4)-(12+y) решите пж

1) 2(3-x)-(8+x) = 6-2x-8-x = -2-3x2) -4(y+5)+(12-y) = -4y-20+12-y = -5y-83) -(7-x)+4(x-5) = -7+x+4x-5 = 5x-124) -9(y-4)-(12+y) = -9y+36-12-y = -10y+24