Solve for x
x=-\left(y+6000\right)
Solve for y
y=-\left(x+6000\right)
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13000+x+y=7000
Swap sides so that all variable terms are on the left hand side.
x+y=7000-13000
Subtract 13000 from both sides.
x+y=-6000
Subtract 13000 from 7000 to get -6000.
x=-6000-y
Subtract y from both sides.
13000+x+y=7000
Swap sides so that all variable terms are on the left hand side.
x+y=7000-13000
Subtract 13000 from both sides.
x+y=-6000
Subtract 13000 from 7000 to get -6000.
y=-6000-x
Subtract x from both sides.
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