Mario set a goal to run 130 miles this month to prepare for a marathon. So far this month, he has run 65 miles. Write and solve an equation to show how many miles Mario has left to run this month to reach his goal.

m + 65 = 130; m = 65 miles
m − 65 = 130; m = 195 miles
65m = 130; m = 2 miles
m over 65 equals 130; m = 8,450 miles