Question

Solve:
X=3y-1
X+2y=9

Answer 1

Answer:

$X=5, y=2$

Step-by-step explanation:

Given Equations:

$X=3y-1$       Equation:1

$X+2y=9$        Equation:2

Using substitution method, put the value of 'X ' in equation:1 in equation:2

           $X+2y=9$

           $(3y-1)+2y=9\\\\3y-1+2y=9\\\\5y-1=9$

Adding '1' to both sides:

             $5y-1+1=9+1\\\\5y=10\\\\y=\frac{10}{5}\\\\y=2$

Putting value of 'y' in equation:1 to find 'X'

                  $X=3y-1\\\\X=3(2)-1\\X=6-1\\X=5$

So,            $X=5, y=2$