SOLUTION: Method of Substitution 1. Solve each linear system using the method of substitution. Check your answers. a) y=3x-4 x+y=8 Pleaseeeee and thank you very much i need it right

Question 181829: Method of Substitution
1. Solve each linear system using the method of substitution. Check your answers.
a) y=3x-4
x+y=8
Pleaseeeee and thank you very much i need it right now pleasee
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the second equation

Plug in . In other words, replace every "y" with 3x-4

Combine like terms

Add 4 to both sides

Divide both sides by 4 to isolate "x"

So the first part of the answer is

Go back to the first equation

Plug in

Multiply

Subtract

So the second part of the answer is

=========================================

Answer:

So the solutions are and which form the ordered pair (3,5)

I'll let you do the check (simply plug in the two solutions and simplify)
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