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Question

Solve:
2-7x1-5x=3+7x4+5x

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Solution

2 - 7x1 - 5x = 3 + 7x4 + 5x (4+5x)(2-7x) = (1-5x)(3+7x) (by cross multiplication) 8 - 28x + 10x - 35x2 = 3 + 7x - 15x - 35x2 -35x2 - 18x +8 = -35x2 - 8x + 3 -35x2 + 35x2 -18x + 8x = -8 + 3 -10x = -5 x = -5-10= 12 x = 12

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