Write this as an equation and solve

The number is 30
Ok, MissWalker! Please try your best to understand this, it may get confusing.
I have solved this on a different website, and here is my solving in a picture. I hope I helped!!! :D
Answer:
B
Step-by-step explanation:
Cross multiplication :)
Answer:
B. y=2t-3
Step-by-step explanation:
First rewrite the parametric equation.
f(x)= y = at + b
Once arranged you get
2x - y =3
2x - 3 = y
f(x) = y = 2x - 3
Replace x with t, x = t