Which value of m makes the equation -(-5m-3) + 2m = 10( m + 3) true?

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2 Answers

Expand the brackets:

5m+3+2m=10m+30

Subtract 7m from each side:

3=3m+30

Subtract 30 from each side:

-27=3m so 3m=-27

Divide through by 3:

m=-9

This value will make equation true:

-(45-3)-18=-42-18=-60=10(-9+3)=10(-6)=-60. So equation is true when m=-9.

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