Amanda, Henry, and Scott have a total of $89 in thier wallets. Amanda has 6$ less than Scott. Henry has 3 times what scott has. How much does each have?
Solution
Let x be the amount of money Amanda has
Let y be the amount of money Henry has
Let z be the amount of money Scott has
Amanda, Henry, and Scott have a total of $89 in thier
wallets
The above statement gives the following equation
x + y + z = 89
Amanda has 6$ less than Scott
The above statement gives the following equation
x = z - 6
Henry has 3 times what scott has.
The above statement gives the following equation
y = 3z
We get the following 3 equations
x + y + z = 89 equation 1
x = z - 6 equation 2
y = 3z equation 3
Replace x = z - 6 and y = 3z in equation 1
z - 6 + 3z + z = 89
5z - 6 = 89
5z - 6 + 6 = 89 + 6
5z = 95
Divide both sides by 5
5z/ 5 = 95 / 5
z = 19
Scott has 19 dollars
y = 3z = 3 × 19 = 57
Henry has 57 dollars
z - 6 = x
19 - 6 = x
13 = x
Amanda has 13 dollars
Nov 15, 18 05:01 PM
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Nov 15, 18 05:01 PM
Modeling multiplication with number counters - Learning multiplication is fun!
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