0.9a=-4

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Solution for 0.9a=-4 equation: 



0.9a=-4

We move all terms to the left:

0.9a-(-4)=0

We add all the numbers together, and all the variables

0.9a+4=0

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

0.9a=-4

a=-4/0.9

a=-4+0.4/0.9

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