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Question

Solve each of the following equation and also check your result in each case:
(45-2x)15-(4x+10)5=(15-14x)9

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Solution

45-2x15-4x+105=15-14x9or 45-2x-12x-3015=15-14x9or 15-14x5=15-14x3 [Multiplying both sides by 3]or 45-42x=75-70x [After cross multiplication]or 70x-42x=75-45or 28x=30or x=3028or x=1514Thus, x=1514 is the solution of the given equation.Check:Substituting x=1514 in the given equation, we get:L.H.S.=45-2×151415-4×1514+105=45×7-15105-30+7035=300105-10035=0R.H.S.=15-14×15149=0 L.H.S.=R.H.S. for x=1514

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