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Solving a System of Two Linear Equations

GMAT-SADFEY

Solve for $k$ and $z$ : $k=3z+5 $ and $ 2k+2z=74 $.

A

$ k=17, z=4 $

B

$ k=20, z=5 $

C

$ k=23, z=6 $

D

$ k=26, z=7 $

E

$ k=29, z=8 $