Answer:
r E R
Explanation : 3(7/3r+4/3)-2r+8=5r+12 multiply parentheses by 3
Do bracket first
(7r+4) answer from working out the bracket from above 7r+4-2r+8=5r+12
collect like terms
5r+4+8=5r+12
Add the numbers
5r+12=5r+12
the statement is true for any value of r, because both sides are identical
Solution
r E R
