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Isolate the variable. Get it by itself.

9+11x=89+x

9+11x-1x=89+x-1x Subtraction property of equality

9+10x=89

9+10x-9=89-9 subtraction property of equality

10x=80

x=8 division property of equality.

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Q: What is the answer for this equation 9 plus 11x equals 89 plus x?
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