Question

Carly and Janiya put some money into their money boxes every week. The amounts of money (y), in dollars, in their money boxes after certain amounts of time (x), in weeks, are shown by the equations below:

Carly
y = 60x + 40

Janiya
y = 50x + 80

After how many weeks will Carly and Janiya have the same amount of money in their money boxes and what will that amount be?

A.5 weeks, $280

B.5 weeks, $340

C.4 weeks, $280

D.4 weeks, $340

Answer 1

@israa88

Answer 2

@torijhhs

Answer 3

Set each equal to one another and solve for x

Answer 4

60x+40=50x +80

Answer 5

so subtract 40 on both sides

Answer 6

u woul be left with 60x=50x +40
then subtract 50x on both sides
so u would be left with 10x=40

Answer 7

ok

Answer 8

then u would divide both sides with 10x so
x=4

Answer 9

so C or D

Answer 10

C

Answer 11

yeah i would go with C

Answer 12

You would substitue 4 for x in each equation

Answer 13

thanks

Answer 14

does that makes sense ?

Answer 15

yes

Answer 16

anything else ?