I know the answer to a but the answer to b I can’t do
I don’t know why

Answer:
x=4
Step-by-step explanation:
I used cross multiplication
7+2x/3=5
7+2x/3=5/1
7+2x(1)=5(3)
7+2x=15
2x=15-7
2x=8
x=4
Answer:
x = 4
Step-by-step explanation:
The goal is to get x by itself.
1. Multiply both sides by 3 and you are left with:
7 + 2x = 15
2. Subtract 7 from both sides and you are left with:
2x = 8
3. Simplify by dividing each side by 2 and you are left with the answer:
x = 4