Jim earned $700 this week. This was $20 less than four times the amount he earned last week. Which equation, when solved for x, gives the amount of money Jim earned last week?

Solution:

Given that,

Jim earned $700 this week

This was $20 less than four times the amount he earned last week

To find: amount of money Jim earned last week

Let "x" be the amount of money Jim earned last week

From given,

Jim earnings this week = $20 less than four times the amount he earned last week

Therefore,

700 = 4x - 20

Thus the equation is found