Question

emma has 15 cookies and eats 2 cookies per day evan has 45 cookies and eats 8 each day how would you write and solve an equation to figure out after how many days they will have the same number of cookies

Answer 1

lets say cookies = x and days = y.

2x times y = 15.

8x times y = 45.

Answer 2

Solution:

we are given that

Emma has 15 cookies and eats 2 cookies per day.

So the number of cookies left after n days can be written as

$Emma=15-2n$

Evan has 45 cookies and eats 8 each day.

So the number of cookies left after n days can be written as

$Evan=45-8n$

Number of days after which they will have equal number of cookies can be found as below

$15-2n=45-8n$

$8n-2n=45-15$

$6n=30$

$n=5$

Hence both will have equal number of cookies after 5 days.