Hey there!
-6(2r + 8) = -10(r - 3)
-6(2r) - 6(8) = -10(r) - 10(-3)
-12r - 48 = -10r + 30
ADD 10r to BOTH SIDES
-12r - 48 + 10r = -10r + 30 + 10r
SIMPLIFY IT!
-2r - 48 = 30
ADD 48 to BOTH SIDES
-2r - 48 + 48 = 30 + 48
SIMPLIFY IT!
-2r = 78
DIVIDE -2 to BOTH SIDES
-2r/-2 = 78/-2
SIMPLIFY IT!
r = -39
Therefore, your answer is: r = -39
Good luck on your assignment & enjoy day!
~Amphitrite1040:)