What is order pair for 7x-3y equals 21?

Answer 1

7x-3y=21

Think of it this way. Block 3y or multiply 3(0)=0. Then you get:

7x=21

X=3

In vice versa, block 7x or multiply 7(0)=0 and look at:

3y=21

Y=7

So an ordered pair is (x,y)

Thus, you get (3,7)