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Tommy put some money in his pocket and went to the store. After paying $12 for a kite, he had 3/7 of his money left. How much money did Tommy have left?

 Jun 24, 2022
 #1
avatar+124676 
+1

M - 12 = (3/7)M

 

M - (3/7)M =  12

 

(4/7)M = 12

 

M = 12 (7/4) =  $21   is what he started with

 

He has   21 - 12 = $9  left

 

 

cool cool cool

 Jun 24, 2022
 #2
avatar+231 
+1

let's call the money he initally had = $x

when he removes $12 from $x he had 3/7 of $x left

$x - $12 = 3/7 of $x

($x - $12) = $3x/7

7 ($x - 12) = $3x

$7x - $84 = $3x 

$7x - $3x = $84

$4x = $84

$x = 21

Therefore he initially had $21.

$21 - (how much spent) = (what's left)

$21 - $12 = $9.

$9 was left

 Jun 24, 2022

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