Answer:
x = 2
Step-by-step explanation:
First, you cross multiply then that will give you
9x - 3 = 5x + 5
collect like terms
9x - 5x = +5 + 3
= 4x = 8
Divide both sides by the coefficient of x that's 4
= 2
Last one i think
x=0 or x=6
The answer is 80, 2x+3x+4x=180, so x=20. 20*4=80.
The correct answer is 40 miles per hour.