Solve for x
x=60-z
Solve for z
z=60-x
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x-15=45-z
Subtract z from both sides.
x=45-z+15
Add 15 to both sides.
x=60-z
Add 45 and 15 to get 60.
z-15=45-x
Subtract x from both sides.
z=45-x+15
Add 15 to both sides.
z=60-x
Add 45 and 15 to get 60.
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