The answer is 12.
Steps
If that number is x
(3+x)/(8+x)=3/4
"Cross multply"
4(3+x)=3(8+x)
12+4x=24+3x
x=12
To check: add 12 to 3 and 8. 3+12=15 and 8+12=20. 15/20=3/4
i think C but i dont know forsure
Answer: B.f(n)9n-12
Step-by-step explanation:
Answer:
r=4
Step-by-step explanation:
15r-6r=36
9r=36
r=36/9
r=4
Answer: 25=29
Step-by-step explanation:5x5=25
4x5+9=29
