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3a/7=-21
We simplify the equation to the form, which is simple to understand
3a/7=-21
Simplifying:
+ 0.428571428571a=-21
We move all terms containing a to the left and all other terms to the right.
+ 0.428571428571a=-21
We simplify left and right side of the equation.
+ 0.428571428571a=-21
We divide both sides of the equation by 0.428571428571 to get a.
a=-49
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