1. 2,3(5-x)+7,6(x-2) = - 1,46
2. 5,5(x-2,7) - 3,1(4,5-2x)=7,2(3,5+1)-1,2
3. 3x(x+2) - 4,1 = (2x-3) x+3, 7
Решите пожалуйста срочно
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