24=3r/4
Multiply both sides by 4
24=(3r)/4
(24)*(4)=(3r/4)*(4)
96=3r
Flip the equation
3r=96
Divide both sides by 3
3r/3=96/3
r=32
Now lets check if the answer is good
24=3(32)/4
24= 96/4
24=24
You see , the answer is good .
I hope that's help ! Let me know .