Answer:
Everything except second and third one

we have to solve for x , solving for x means , we have to isolate x one one side , by shifting all other variables to other side
So

Multiply both sides by 2
2A = h(x+y)
Divide both sides by h
2A/h = x+y
Subtract y from both sides

or

Let van =v and bus=b
V+6B=324
9V+3B=264×2 this will become
18V+6B=528 minus equ 1 from equ 2
-17V=-204 divide both side by -17
V=-204/-17=12
if V is 12 put it in equ 1
12+6B=324,6B=324-12=312 divide both side by 6
B=312/6=52
therefore the van and bus will take 12 and 52 persons respectively
Answer:
<h2>x=5</h2>
Step-by-step explanation:
Isolate by the x from one side of the equation.
First, you have to subtract by 3x from both sides.

Solve.
x=5

Therefore, the solution is x=5.