Answer:
r = 0
Step-by-step explanation:
-6(3 - 6r) = -18 + 4r //Distribute -6
-18 + 36r = -18 + 4r // Add 18 on both sides
36r = 4r //Subtract 4r on both sides
36r - 4r = 0 //Combine like terms
32r = 0 //Divide 32 on both sides
r = 0/32
r = 0
Check:
-6(3 -6r) = -18 + 4r //Replace 0 in place of r, since r=0
-6(3 - 6(0)) = -18 + 4(0) //Multiple
-6(3) = -18
-18 = -18 //True, therefore r=0
