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-2[-2(-2+2x)+a]=4[4(4-a)+x]+2a-2(4-4x+a)=4(16-4a+x)+2a-8+8x-2a=64-16a+4x+2a8x-4x=-14a+2a+64+84x=-12a+72 |:4x=-3a+18a.x=-3(18-3x)+18x=-54+9x+18x-9x=-54+18-8x=-36 |:(-8)x=4 4/8 =4 1/2 nieb. x=-3(6-1/3x)+18x=-18+x+180=0 odp. b