Hey there!
84 + 4m = 276
➡️ 4m + 84 = 276
SUBTRACT 84 to BOTH SIDES
4m + 84 - 84 = 276 - 84
CANCEL out: 84 - 84 because that gives you 0
KEEP: 276 - 84 because that helps solve for the m-value
276 - 84 = 192
NEW EQUATION: 4m = 192
DIVIDE 4 to BOTH SIDES
4m/4 = 192/4
CANCEL out: 4/4 because that gives you 1
KEEP: 192/4 because that helps you get the m-value
NEW EQUATION: m = 192/4
SIMPLIFY ABOVE AND YOU HAVE YOUR ANSWER
m = 48
Therefore, your answer is: m = 48
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)