Answer
The answer is (m = 9)
Explanation:
Rearrange terms = Step 1
0.4(20-10m) = 2.5 - 2m-12.5
0.4(-10m+20) = 2.5 - 2m - 12.5
Step 2 = Combine multiplied terms into a single fraction
Step 3 = Distribute
Step 4 = Subtract the numbers
Step 5 = Rearrange terms
Step 6 = Add 2m to both sides
Step 7 = Simplify
Step 8 = Multiply all terms by the same value to eliminate fraction denominators
Step 9 = Cancel multiplied terms that are in the denominator
Step 10 = Multiply the numbers
Step 11 =Subtract 40 from both sides
Step 12 = Simplify
Step 13= Divide both sides by the same factor
Last but not least is Simplify
Hope it helped:)