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Marc and his brother start saving money at the same time. Marc starts with $145 and adds $10 every month. Ty starts with $20 and adds $15 every month. When will they have the same amount?

 Feb 11, 2020
 #1
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Let n be the number of months when they will have the same amount

 

So  we have

 

145  +  10n  = 20  + 15n        subtract  10n , 20  from both sides

 

125  =  5n           divide both sides by 5

 

25 =  n

 

They will have the same amount  after 25 months

 

 

cool cool cool

 Feb 11, 2020

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