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Raj and David save a same amount of money.David spent $120 buying a birthday gift for her friend.In the end Raj had 3 timesas much as David.How much does raj have?

Guest Apr 2, 2017
 #1
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Raj's money = 3 * David's money

r = 3d

 

David's money = Raj's money - $120

d = r - 120

 

Substitute.

r = 3 * (r - 120)    Distribute.

r = 3r - 360         Subtract 3r from both sides.

r - 3r = -360

-2r = -360           Divide by -2

r = -360/-2

r = 180

 

Raj's money = $180

hectictar  Apr 2, 2017

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