5-4a=90

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Solution for 5-4a=90 equation: 



5-4a=90

We move all terms to the left:

5-4a-(90)=0

We add all the numbers together, and all the variables

-4a-85=0

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

-4a=85

a=85/-4

a=-21+1/4

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