20y+-7y=-13

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Solution for 20y+-7y=-13 equation: 



20y+-7y=-13

We move all terms to the left:

20y+-7y-(-13)=0

We add all the numbers together, and all the variables

13y+13=0

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

13y=-13

y=-13/13

y=-1

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