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2.50+0.75x=7
We move all terms to the left:
2.50+0.75x-(7)=0
We add all the numbers together, and all the variables
0.75x-4.5=0
We move all terms containing x to the left, all other terms to the right
0.75x=4.5
x=4.5/0.75
x=6
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