Six friends went out to lunch. They each started with the same amount of money, and they each spent $3. They ended with a combined total of $42. How much money did each of them have to start?
(a) Write an equation that could be used to answer the
question above. First, choose the appropriate form. Then,
fill in the blanks with the numbers 6, 3, and 42. Let x
represent the amount (in dollars) each person had to start.
X
6
?
30
o [(x + D = 0
o [(x -D 0
(b) Solve the equation in part (a) to find the amount in
dollars) each person had to start.