Question

Consider the following pair of equations:

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.

please help explain idk :(

Answer 1

Substitute y= x-1 into
y -->> y= -2x + 8
x-1= -2x + 8
Add 1 both sides and +2x which then gives you
3x= 9
the divide by 3 and your answer should be
x= 3

Answer 2

how would I find y? I already got x but the y part confuses me ;/

Answer 3

both y is same so -2x+8=x-1
-2x-x=-8-1
-3x=-9
3x=9
x=9/3
x=3
y=x-1
y=3-1
y=2

Answer 4

Thank you I really appreciate it. This helped me understand how to do this :).