Question

y = −2x + 8
y = x − 1

Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.

Answer 1

How would you solve it by substitution?

You just substitute one equation into the other

you see how the first equation says

y equals -2x + 8

and the second equation is also
y equals x - 1

so remember
if a = b
and a = c
then that means b = c

so basically set the two equations equal to each other and solve for x