X+x-30+70=180

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Solution for X+x-30+70=180 equation: 



X+X-30+70=180

We move all terms to the left:

X+X-30+70-(180)=0

We add all the numbers together, and all the variables

2X-140=0

We move all terms containing X to the left, all other terms to the right

2X=140

X=140/2

X=70

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