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7x-9=7(77)-6
We move all terms to the left:
7x-9-(7(77)-6)=0
We add all the numbers together, and all the variables
7x-9-771=0
We add all the numbers together, and all the variables
7x-780=0
We move all terms containing x to the left, all other terms to the right
7x=780
x=780/7
x=111+3/7
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