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x is 4 more than half of y We can write: x = y/2 + 4

y is 10 more than half of x We can write: y = x/2 + 10

Take x = y/2 + 4 and replace y with x/2 + 10 We get: x = (x/2 + 10)/2 + 4 Multiply both sides by 2 to get: 2x = x/2 + 10 + 8 Multiply both sides by 2 (again) to get: 4x = x + 20 + 16 Subtract x from both sides: 3x = 36 Solve: x = 12

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Re: If x is 4 more than half of y and if y is 10 more than half
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06 Dec 2017, 17:11