What is the answer to 2m + 57 = - 8M + 7

2m + 57 = - 8m + 7

add 8m to each side to get the variables on one side

2m+8m + 57 = - 8m+8m + 7

10m + 57 = 7

subtract 57 from each side to the constant on the other side

10m + 57-57 = 7-57

10m = -50

divide by 10 on each side to get m alone

10m/10 = - 50/10

m = - 5