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7
2-3(5-x+5(7))=3x-1
7
2-3(5+35-x)=3x-1
7
2-3(40-x )=3x-1 multiplicamos todo por 7
7
2(7)-3(40-x)=7(3x-1)
14-120+3x=21x-7
-106+3x=21x-7
3x-21x= -7+106
-18x=99
x= - 99
18
x= - 11
2