Q: What is the answer to 5y plus 16 equals 7y-12?

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The Commutative Property of Addition.

(2, 2)

2x + 5y = 16 -2x - 3y = -14 2y = 2 y = 1 / x = 5.5 (5.5,1) or (5 1/2,1)

11y + 16 + 5y = 16y + 16 = 16(y + 1)

(9,3)

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The Commutative Property of Addition.

no

(2, 2)

2x + 5y = 16 -2x - 3y = -14 2y = 2 y = 1 / x = 5.5 (5.5,1) or (5 1/2,1)

(x, y) = (3, 2)

11y + 16 + 5y = 16y + 16 = 16(y + 1)

(9,3)

(-5, 2)

x=(-5y-1)/3

5y + 7 = 25y = -5y = -1

If: -x-3y = -4 and 3x+5y = 16 Then: x = 7 and y = -1

3x + 5y = -1 2x - 5y = 16 Add the two equations: 5x = 15 or x = 3 Substitute for x in the first equation: 3*3 + 5y = -1 15 + 5y = -1 5y = -10 so y = -10/5 = -2 The solution is (x, y) = (3, -2)