Решить уравнение: 1)13(2x+1)=9x
2)1,7x+2,04=-6,8x
3)10x=-20+12x
4)2,3*(5-3n)+7,6*(m-2)=-1,46
5)3,1(2-x)+4,5=7,2-4,3(x-3,7)
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