10+(-5)-(-20)=

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Solution for 10+(-5)-(-20)= equation:


10+(-5)-(-20)=0

We simplify the equation to the form, which is simple to understand 
10+(-5)-(-20)=0

Remove unnecessary parentheses
+10-5-(-20+)=0

Remove unnecessary parentheses
10-5+20=0

We move all terms containing  to the left and all other terms to the right. 
0=0-10+5-20

We simplify left and right side of the equation. 
0=-25

0=-25

The left and right sides are not equal, therefore there is no solution. This equation is invalid.

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