Step-by-step explanation:
the answer in the picture that i sent
Answer:
r=7
Step-by-step explanation:
5r-7=2r+14
add sevento both sides
5r=2r+21
Subtract 2r from both sides.
3r=21
divide both sides by 3
r=7
The answer is 100 if that 5 and 2 is separate
20% * 300 = 2 * (10% * 300) = 2*30 = 60