a. 260 + 0.29x = 419.5
b. 550 miles
How to:
•260 is a number that you subtract from the total
•0.26 is what your trying to find how many of (miles in this example) so you put a variable (the letter) after it
•419.5 is the total
260 + 0.29x = 419.5 Subtract whole #
-260 - 260
—————-
0.29x = 159.5. Divide #x
______. ______
0.29. 0.29
X= 550