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Q: 7x plus 5y equals 2 8x - 9y equals 17?

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24

7x + 5y 7(3) + 5(2) 21 + 10 = 31

It is: 7x+10y

Multiply the bottom equation by 5.

x = (-5y + 4) / 7

7x+17 = 45 7x = 45-17 7x = 28 x = 4

x = 0 and y = 4

69

7x + 9 = 6x + 17 7x - 6x = 17 -9 x = 8

(7x-3y) + (2x+5y) = 9x+2y

3x + 17 + 5x = 7x + 10Combine (add) the 'x'-terms on the left side of the equation:8x + 17 = 7x + 10Subtract 17 from each side:8x = 7x - 7Subtract 7x from each side:x = -7

5x + 17 = 7x - 123 123 + 17 = 7x - 5x 140 = 2x x = 140 ÷ 2 x = 70

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