42x+3+155x+4=357x+6⇒42x+3+155x+4=217x+6+147x+6⇒42x+3-147x+6=217x+6-155x+4⇒28x+24-28x-427x+62x+3=105x+84-105x-905x+47x+6⇒-182x+3=-65x+4⇒32x+3=15x+4⇒2x+3=15x+12⇒13x=-9∴x=-913 ans.
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