Помогите пожалуйста решить. а)-3(2,1x-4)-4,2=1,2(-5x+0,5). б) 6,4(2-3x)=6(0,8x-1) + 6,8; в) 5,8x-40,1 = 3,2x-23,9.
0,8 -2,4
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