Question 666558
Establish variables
x = adult
y = children
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.6x + .25y = 140
x+y=280
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Substitute x = 280-y into the first equation
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.6(280-y) + .25y = 140
168 - .6y + .25y = 140
Combine like terms
-.6y + .25y = 140-168
-.35y = -28
Divide both sides by -.35
{{{highlight_green(y = 80)}}} children
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