10a+40=90

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Solution for 10a+40=90 equation: 



10a+40=90

We move all terms to the left:

10a+40-(90)=0

We add all the numbers together, and all the variables

10a-50=0

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

10a=50

a=50/10

a=5

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