Question 666192
Establish the variables
x = adult tickets
y = children's tickets
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Given
x+y=855
2x+1y=1060
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Rearrange x+y=855 as x=855-y and substitute into the second equation
2(855-y) + y = 1060
1710 - 2y + y = 1060
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Isolate y
1710 - 1060 = 2y - y
650 = y
{{{highlight_green(650)}}} children's tickets
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Rearrange x+y=855 as y = 855-x and substitute into the second equation
2x + 855-x = 1060
Isolate x
2x - x = 1060 - 855
x = 205
{{{highlight_green(205)}}} adult tickets
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Check {{{cartoon(
205 + 650,
855)}}}

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