Question

practice finding solutions to systems of equations using substitution.
the value of x in this system of equations is 1.
3x + y = 9
y = -4x + 10

1. substitute the value of y in the first equation. \t\t3x + (-4x + 10) = 9
2. combine like terms. \t\t\t\t\t\t -x + 10 = 9
3. apply the subtraction property of equality. \t\t -x = -1
4. apply the division property of equality. \t\t x = 1

what is the value of y?
y =

Explanation:

Step1: Substitute x=1 into y-equation

$y = -4(1) + 10$

Step2: Calculate the value of y

$y = -4 + 10 = 6$

Answer:

$6$