_____21. What is r equal to in the eqution 17 r = 612?

a. 32 c.38

b. 36 d. 40


_____22. What is w equal to in -87 – w = -50


a. -37 c. -33

b. 33 d. 37


_____23. What is the value of 2x – y + 3z, where x = 1, y = 0, z = 2


a. -4 c. 4

b. 8 d. -8

_____24. What is the value of 5n – 4 = 41


a. 5 c. 9

b. 8 d. 12


_____25. What is the value of x in
x = 12 ?

a. 9 c. 15

b. 12 d. 18


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