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3.
0,7х+5(5х-1)=6,5+2,7х





4.
2/3(9-12х)=1/5(10х-4)





5.
0,3(0,4х-1,2)+0,36х=3





6.
3(2х-1)+6(3х-4)=83+5(х-3)





7.
8(7-4у)-19=7(4у+1)-5(8у-1)





8.
754-33(2а-3)=453+2(35+14а)





9.
2(3(2-х)-5(х+3))=4

10.
3(х-4+3(2х-5)-х)+2(8-х)=4х+7




 
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