КОРЕНЬ УРАВНЕНИЯ!........

Question

КОРЕНЬ УРАВНЕНИЯ!........

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Answer 1

1/(7х+3)=5
1/(7х+3)-5=0
1/(7х+3)-(35х+15)/(7х+3)=0
1-35х-15=0
-35х-14=0 :(-7)
5х+2=0
5х=-2
х=-2/5
х=-0,4