Question

What is the value of r in the equation 4r – 8 = 5r + 12? (4 points)

–20


–1


1


20

Answer 1

4r-5r=12+8
-r=20
r=-20

Answer 2

4r - 8 = 5r + 12
4r - 5r = 12 + 8
-r = 20
r = -20 <===