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x+y = 10 and y = x+8

x+x+8 = 10

x+x = 10-8

2x = 2

x = 1

Substitute the value of x into the original equations to find the value of y:

So: x = 1 and y = 9

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Q: Solve this equation using subtitution x plus y equals 10 and y equals x plus 8?
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