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a/10=-2/5
We simplify the equation to the form, which is simple to understand
a/10=-2/5
We move all terms containing a to the left and all other terms to the right.
+ 0.1a=-0.4
We simplify left and right side of the equation.
+ 0.1a=-0.4
We divide both sides of the equation by 0.1 to get a.
a=-4
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