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А) 2u-3(7-2u)=3
Б) 12-y=5(4-2y)+10
В)2-2(x-8)=4x-4

А) 2u-3(7-2u) = 32u-3*7-3*(-2u) = 32u-21+6u = 32u+6u = 3+218u = 24u = 24:8u = 3Б) 12-y = 5(4-2y)+1012-y = 5*4+5*(-2y)+1012-y = 20-10y+10-y+10y = 20+10-129y = 18y = 18:9y = 2В) 2-2(x-8) = 4x-42-2*x-2*(-8) = 4x-42-2x+16 = 4x-4-2x-4x = -4-2-16-6x = -22x = -22:(-6)x = 3⁴/₆x = 3²/₃