The given equations are:
1) x = 12+ y
2) 4x + 9y = - 17
Using the value of x from first equation and substituting it in second equation, we get:
[tex]4(12+y)+9y=-17 \\ \\
48+4y+9y=-17 \\ \\
13y=-65 \\ \\
y=-5[/tex]
Using this value of y in first equation to find x:
[tex]x=12+y=12+(-5) \\ \\
x=12-5 \\ \\
x=7[/tex]
Therefore, the solution to the given equation is (7, -5)
