2a-(-9)=13

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Solution for 2a-(-9)=13 equation:


2a-(-9)=13

We simplify the equation to the form, which is simple to understand 
2a-(-9)=13

Remove unnecessary parentheses
2a+9=13

We move all terms containing a to the left and all other terms to the right. 
+2a=+13-9

We simplify left and right side of the equation. 
+2a=+4

We divide both sides of the equation by 2 to get a. 
a=2

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