Answer:
I believe that g=dc
Step-by-step explanation:
You swap positions with g and c along with their sign of operation.
-28+2r+3r+5
simplified it is -23+5r
C. You can graph it on Desmos and all the given points work.
Answer:

Step-by-step explanation:

Move 3k to left hand side and change it's sign
Similarly, move 4.5 to right hand side and change it's sign

Collect like terms

Subtract 4.5 from 18

Divide both sides by 4.5

Calculate

Hope I helped!
Best regards! :D