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0.8(4-a)=-5.6a
We move all terms to the left:
0.8(4-a)-(-5.6a)=0
We add all the numbers together, and all the variables
0.8(-1a+4)-(-5.6a)=0
We multiply parentheses
-0.8a-(-5.6a)+3.2=0
We get rid of parentheses
-0.8a+5.6a+3.2=0
We add all the numbers together, and all the variables
4.8a+3.2=0
We move all terms containing a to the left, all other terms to the right
4.8a=-3.2
a=-3.2/4.8
a=-2.6666666666667/4
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