SOLUTION: solve each system by substitution. check your answers. 1. {y=x+1 {2x+y=7 2. {x=y-2 {3x-y=6

Algebra ->  College  -> Linear Algebra -> SOLUTION: solve each system by substitution. check your answers. 1. {y=x+1 {2x+y=7 2. {x=y-2 {3x-y=6      Log On


   

Question 548014: solve each system by substitution. check your answers.
1. {y=x+1
{2x+y=7
2. {x=y-2
{3x-y=6
Answer by mathstutor458(57) About Me  (Show Source):
You can put this solution on YOUR website!

y=x+1 ---1
2x+y=7 ----2
substitute 1st equation in 2
2x+x+1=7
3x=7-1=6
x=6/3=2
y=6+1=7

2. x=y-2 ---1
3x-y=6 ----2
substitute 1st equation in 2
3(y-2)-y=6
2y-6=6 =>2y=12 =>y=6
x=6-2=4