Question

Marcos and Adelyn are comparing the amount of lunch money they spent this week. They spent $45 together on lunches. Marcos spent d on lunches, and Adelyn spent $6 less than Marcos. How much money did Marcos spend on lunches this week? A. $31.50 B. $25.50 C. $22.50 D. $19.50

Answer 1

B. $25.50

Explanation:

d = how much money Marcos spent

k = how much money Adelyn spent

d + k = 45

k = d - 6

rearrange the first equation to . . .

k = 45 - d

. . . and plug it into the other equation.

45 - d = d - 6

45 + 6 = d + d

51 = 2d

d = 25.50

hope this helps !

Answer 2

B. $25.50

Explanation:

On this question you have to subtract 6 dollars from one of the answers and add that same amount back on because that would equal the total amount of lunch money. A wouldn't work because 31.50-6+31.50 is over 45 dollars. When you have 25.50-6+25.50 you get 45!