18a-(-5)+(-20)=(-15)

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Solution for 18a-(-5)+(-20)=(-15) equation:


18a-(-5)+(-20)=(-15)

We simplify the equation to the form, which is simple to understand 
18a-(-5)+(-20)=(-15)

Remove unnecessary parentheses
18a+5+(-20)=(-15)

Remove unnecessary parentheses
+18a+5-20=+(-15+)

Remove unnecessary parentheses
18a+5-20=-15

We move all terms containing a to the left and all other terms to the right. 
+18a=-15-5+20

We simplify left and right side of the equation. 
+18a=0

We divide both sides of the equation by 18 to get a. 
a=0

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