0.7x-7=3.5x-21

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Solution for 0.7x-7=3.5x-21 equation: 



0.7x-7=3.5x-21

We move all terms to the left:

0.7x-7-(3.5x-21)=0

We get rid of parentheses

0.7x-3.5x+21-7=0

We add all the numbers together, and all the variables

-2.8x+14=0

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

-2.8x=-14

x=-14/-2.8

x=+5

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