##### You have \$80 and your brother has \$275 dollars. You save \$10 of your allowance

 Algebra Tutor: None Selected Time limit: 1 Day

You have \$80 and your brother has \$275 dollars.  You save \$10 of your allowance each week.  Your brother spends his allowance plus \$15 each week.

A.    Write an equation to model this.

B.     How long before you have as much money as your brother?

C.     How much have you saved when you catch up to him?

Jun 26th, 2015

Let the x is  number of week

than Equation of your money after x week = 80+10x

Equation for Brother's money after  x weeks = 280-15x

B)

80+10x = 280-15x ;   25x =200    ; x = 200/25 = 8 weeks

C)    saving in 8 weeks = 8*10 = \$80

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Jun 26th, 2015

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Jun 26th, 2015
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