How do you use substitution to solvey=122x-y=4

y = 12.

Put the value of y to the equation 2x - y = 4:

2x - 12 = 4       add 12 to both sides

2x = 16      divide both sides by 2

x = 8

(- 1, 0 )

step-by-step explanation:

an x- intercept is where the function crosses the x- axis.

to find the x- intercept/s look for the value of x when f(x) = 0

from the given table there are 3 values of x where f(x) = 0

when x = - 1, x = 2, x = 3

the one that is listed is (- 1, 0 )