Question

Which ordered pair in the form (a, b) is a solution of this equation?
7a - 5b = 28

A. (-2, -3)
B. (0, 4)
C. (4, 0)
D. (-3, -2)

Answer 1

So, since you have two variables to solve in this equation, you have to set either the variable a or b to zero to solve for either a or b. I would choose to set the variable b to zero and try to solve for a.

Answer 2

What would you come up with for a?

Answer 3

use the option given to substitute

Answer 4

Try substitute a=-2 into this equation \[7a-5b=28\]