10x-21=9

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Solution for 10x-21=9 equation:



10x-21=9
We move all terms to the left:
10x-21-(9)=0
We add all the numbers together, and all the variables
10x-30=0
We move all terms containing x to the left, all other terms to the right
10x=30
x=30/10
x=3

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