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HELP!!!
y = -2x + 8
y = x - 1
Exsplain how you will solve the pair od equations by SUBSTITUTION. SHOW ALL STEPS AND WRITE IN THE SOLUTION IN (x,y) FORM.

Thank you so much x

Respuesta :

Amphitrite1040
Your solution⬇

Solution 1▶(y) + 2(x) = 8  

Solution 2▶(y) - (x) = -1


Your graphic organizer⬇

2(x) + (y) = 8 ➡(x) + (y) = -1

For solution 1; and the x-intercept ⬇

(x) -1 + 2(x) = 8  
▶3(x) = 9
▶3(?) = 9
▶Does 3(3) = 9 ?
▶The answer is yes! so we have found the value of 'x-intercept' which is 3
x=3 ✅

For solution 2 ; and the y-intercept

y = x - 1
Keep in mind that the x-intercept is '3' so you can easily find the value of the 'y-intercept' if you solve it correctly!

So, rewrite the problem as: y = 3 - 1

3 - 1 = 2 

y= 2✅

y-intercept▶2

x-iinterceot▶ 3


▶I hope I helped you out with this!
if thats what you meant!
12345678o1234
if they both equal y, then they equal each other. so you put the two equations equal to each other, -2x + 8 = x - 1
therefore 9 = 3x
x = 3
then find y by substituting x = 3 back into one of the equation
y = 3-1
y = 2
the answer is (3,2)

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