8x+21=90

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Solution for 8x+21=90 equation:



8x+21=90
We move all terms to the left:
8x+21-(90)=0
We add all the numbers together, and all the variables
8x-69=0
We move all terms containing x to the left, all other terms to the right
8x=69
x=69/8
x=8+5/8

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