Question 668815
Establish variables
x = ring
y = earrings
z = comb
...
Given
x+y = 9
y+z = 10
z+x = 11
Solve for z
...
z + x = 11
z + 9-y = 11
z + 9-(10-z) = 11
Distribute the -1
z + 9 - 10 + z = 11
Combine like terms
2z = 11 - 9 + 10
2z = 12
{{{highlight_green(z=6)}}} for the comb.
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