13x-7x-78=42

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Solution for 13x-7x-78=42 equation: 



13x-7x-78=42

We move all terms to the left:

13x-7x-78-(42)=0

We add all the numbers together, and all the variables

6x-120=0

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

6x=120

x=120/6

x=20

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