Question

Alex has three times as much money as Jennifer. Jennifer has $12 less than Shannon. Together they have $91. How much money does Alex have?

Answer 1

The amount of money that Alex has is $47.4

Explanation:

Let

x----> amount of money that Alex has

y----> amount of money that Jennifer has

z----> amount of money that Jennifer Shannon has

we know that

x+y+z=91 ----> equation A

x=3y -----> equation B

y=z-12 -----> z=y+12 -----> equation C

substitute equation B and equation C in equation A and solve for y

(3y)+y+(y+12)=91

5y=91-12

y=79/5

y=$15.8

Find the value of x

x=3y ----> x=3(15.8)=$47.4