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Question

Solve the following equation and verify your answer:
3x+54x+2=3x+44x+7

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Solution

3x+54x+2=3x+44x+7or, 12x2+20x+21x+35=12x2+16x+6x+8 [Cross multiply]or, 12x2-12x2+41x-22x=8-35or, 19x=-27or, x=-2719Thus, x=-2719 is the solution of the given equationCheck:Substituting x=-2719 in the given equation, we get:L.H.S.=3(-2719)+54(-2719)+2=-81+95-108+38=14-70=-15R.H.S.=3(-2719)+44(-2719)+7=-81+76-108+133=-525=-15 L.H.S.=R.H.S. for x=-2719

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