Question

Brian has $30 in his piggy bank. He earns $10 a week at his job.

Sarah has $10 in her piggy bank and earns $20 a week at her job.
In how many weeks will they have the same amount of money?
A.1
B.2
С.3
D.Never
I know it’s not a or d someone please help me ASAP I have time

Answer 1

B. 2

Explanation:

10w +30 = 20w +10,

30 - 10 = 20w - 10w,

20 = 10w,

so the answer is,

w = 2

Answer 2

B. 2 weeks

Explanation:

1st week

Brian will have $40

Sarah will have $30

2nd week

Brian will have $50

Sarah will have $50