Answer:
x/3 == 300
Marcy earned $900 last week.
Step-by-step explanation:
For this problem let's consider that 3 equal parts, or "split her income from last week equally" is 3 parts of her entire paycheck.
So she put $300 into savings which is x/3, if we let x represent the amount in dollars of her entire paycheck.
Then we can say the following:
If x / 3 == $300, then x == $900.
x / 3 == 300
( x / 3) * 3 == 300 * 3
( x * 3 / 3 ) == 300 * 3
x == 300 * 3
x == 900
So you can say the following:
x/3 == 300
Marcy earned $900 last week.
Cheers.