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First make the denominator the same

3/10 X3 

2/15 X2

=9/30 + 4/30

=13/30

Multiply through the 3 of the first bracket to get 3m +12. Then multiply out the second bracket by -2 to get -8m -2.

Write it out in a line: 3m + 12 - 8m -2

Simplify: -5m +10

Divide b...

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