Answer
m=5
Work Step by Step
We need to get the m alone, so we cancel out the addition by subtracting 4 on both sides. This leaves us with the equation 4.2m=21. We cancel out multiplication by using division, so we divide both sides of the equation by 4.2 to get that m=5. We plug 5 in for m and confirm that our answer is, indeed, correct.
