If y = 4x, x = 2z, and z = 3a, what is the value of y - x in terms of a? A) -20a
B) -18a
C) 6a
D) 18a
E) 20a
With steps please

D) 18a

Step-by-step explanation:

y - x

= 4x - x

= 3x

= 3(2z)

= 6z

= 6(3a)

= 18a

i dont know i just need points

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions