PAGE: 78 SET: Exercises PROBLEM: 9

Samuel has in the bank.

He wishes to increase his account to a total of  by depositing per week from his pay check.

Write and use an equation to find how many weeks he needs to reach his goal.

Find an equation:

Let represents his depositing pay from his paycheck per a week.

He depositing  from his paycheck per a week is .

He has money in the bank.

His total account is .

His total account is equal to the sum of the he has money and depositinq pay check.

The equation is .

Sum of the ninteen hundred and thirty times of equal twentyfive hundred.

Find how many weeks he needs to reach his goal :

(Orginal equation)

(Subtract  from each side)

(Apply additive inverse property : )

(Divide each side by )

(Cancel common terms)

Therefore, he reaches his goal in weeks.

Check :

(Orginal equation)

(Substitute in the equation)

(Multiply)

(Simplify)

The equation is .

He reaches his goal in weeks.

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