(9*(x-5)+4*(6-x)):8=(3+3*(x+20)-2x)
5*(y-1)-3*(y-2)=7-y+3
РЕШИТЕ И СДЕЛАЙТЕ ПРОВЕРКУ
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(9(x-5)+4(6-x)):8 = 3+3(x+20)-2x(9x-45+24-4x):8 = 3+3x+60-2x9x-45+24-4x = 8(3+3x+60-2x)9x-45+24-4x = 24+24x+480-16x9x-4x-24x+16x = 24+480+45-24-3x = 525x = -175Проверка:(9(-175-5)+4(6+175):8 = 3+3(-175+20)-2(-175)(9(-180)+4*181):8 = 3+3(-155)+350(-1620+724):8 = -112-896:8 = -112-112 = -1125(y-1)-3(y-2) = 7-y+35y-5-3y+6 = 7-y+35y-3y+y = 7-3+33y = 9y = 3Проверка:5(3-1)-3(3-2) = 7-3+35*2-3*1 = 710-3 = 77=7