Answer:
r=3
Step-by-step explanation:
add 4r to both sides.
-> 27=9r
divide both sides by 9
->r=3
good luck!
27 - 4r = 5r
27 = 9r
r = 27 : 9
r = 3
---------------------
check
27 - 4 x 3 = 5 x 3 (remember PEMDAS)
27 - 12 = 15
15 = 15
