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70-7.84x=38.64
We move all terms to the left:
70-7.84x-(38.64)=0
We add all the numbers together, and all the variables
-7.84x+31.36=0
We move all terms containing x to the left, all other terms to the right
-7.84x=-31.36
x=-31.36/-7.84
x=+4
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