Answer:
30=2r+r
r=5
Step-by-step explanation:
30=2r+r would be the answer for the first question because the red line, 30, is equal to the line 2r and r.
r=7.5 because 30=2r+r (combine like terms)➡️ 15=3r (divide both sides by 3)➡️ 5=r
