Amira has $80. Sasha has $40.

In how many months will they both have the same amount of money if Amira saves $40 per month and Sasha saves $50?

Given:

Amira = 80

Sasha = 40

Amira saves 40 per month

Sasha saves 50 per month

Let x be the number of months.

Amira = 80 + 40x

Sasha = 40 + 50x

Amira = Sasha

80 + 40x = 40 + 50x

40x - 50x = 40 - 80

-10x = - 40

x = - 40/-10

x = 4

Amira = 80 + 40x = 80 + 40 (4) = 80 + 160 = 240

Sasha = 40 + 50x = 40 + 50 (4) = 40 + 200 = 240

It would take them 4 months to have the same amount of savings.