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Q: What is the solution to X plus 15 equals 16?

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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)

2x+4 = -16 2x = -16-4 2x = -20 x = -10

Subtract first from second gives -4x = 16 so x = -4 and y = -7

4x-2y=16 has the solution points (0,-8) and (4, 0) at the coordinate axes, and wherever y= 4(x-4).

2x + 4 = 16 2x = 16 - 4 2x = 12 x = 12/2 x = 6

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