7+7+x-7+x-7=154

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Solution for 7+7+x-7+x-7=154 equation: 



7+7+x-7+x-7=154

We move all terms to the left:

7+7+x-7+x-7-(154)=0

We add all the numbers together, and all the variables

2x-154=0

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

2x=154

x=154/2

x=77

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