Can somebody logically explain how to solve this?

Question

2zx(2)y=18 where x=1, z=y?

Lamens terms please? I hated math and still hate math and have not taken any math courses in 20 yrs!

Answer 1

if x = 1 and z = y

then 2zx(2)y = 18

becomes ...

2z(2)z = 18

4z^2 = 18
z^2 = 18/4

z = +/- SQRT(2 x 9 / 4)

z = +/- 3/2 SQRT(2)

y = +/- 3/2 SQRT(2)

x = 1

Answer 2

2zx(2)y = 18
2(y)(1)(2)y = 18
4yy = 18
yy = 18 divided by 4
yy = 4.5
2 = 4.5 (y to the power of 2)
y

y = square root of 4.5
y = 2.12 (3 significant figures)

Sorry, my computer skills not TOO good! I try hard to answer the questions.

Answer 3

well, plug in your x=1 and z=y given statements into the equation. You then get 2y1(2)y=18. So, you simplify to 4(y^2)=18 Then you get (y^2)=4.5 Then take the square root of both sides to get y= 2.12

Answer 4

First replace the value of x with 1 and then the value of z with y.
You get 2*y*1*2*y=18
or 2y*2y=18
4y^2=18
y^2=18/4
y=sqrt (4.5)=2.12=z

Answer 5

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