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0.3*a-4=-1
We simplify the equation to the form, which is simple to understand
0.3*a-4=-1
Simplifying:
+ 0.3a-4=-1
We move all terms containing a to the left and all other terms to the right.
+ 0.3a=-1+4
We simplify left and right side of the equation.
+ 0.3a=+3
We divide both sides of the equation by 0.3 to get a.
a=10
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