Question

Given the equation y=1/2x-2 , determine the value for x when y = 8

Answer 1

Answer:

$x=20$

Step-by-step explanation:

we have

$y=\frac{1}{2}x-2$

This is a linear equation (equation of a line)

To determine the value of x when the value of y=8, substitute the value of y in the equation and solve for x

so

For y=8

substitute

$8=\frac{1}{2}x-2$

isolate the variable x

Adds 2 both sides

$8+2=\frac{1}{2}x-2+2$

$10=\frac{1}{2}x$

Multiply by 2 both sides

$10*2=(2)\frac{1}{2}x$

Rewrite

$x=20$