SOLUTION: how do you solve y=2x-9 x+3y=8 using substitution?

Algebra ->  Expressions-with-variables -> SOLUTION: how do you solve y=2x-9 x+3y=8 using substitution?       Log On


   

Question 394305: how do you solve
y=2x-9
x+3y=8
using substitution?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

using substitution

y=2x-9

x+3y=8

substituting (2x-9) for y

x +3(2x-9) = 8

 7x = 35

  x = 5

  y = 1   |y=2x-9 = 2*5 - 9 = 1

 One solution (1,5)