Solve for z
z=31
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19+3z-4z=-12
Subtract 4z from both sides.
19-z=-12
Combine 3z and -4z to get -z.
-z=-12-19
Subtract 19 from both sides.
-z=-31
Subtract 19 from -12 to get -31.
z=31
Multiply both sides by -1.
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