Respuesta :
[tex]\left\{\begin{array}{ccc}9x-8y=2\\-3x-9y=-24&\text{multiply both sides by 3}\end{array}\right\\\underline{+\left\{\begin{array}{ccc}9x-8y=2\\-9x-27y=-72\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\qquad-35y=-70\qquad\text{divide both sides by (-35)}\\.\qquad\qquad\boxed{y=2}\\\\\text{Put the value of y to the second equation}:\\\\-3x-9(2)=-24\\-3x-18=-24\qquad\text{add 18 to both sides}\\-3x=-6\qquad\text{divide both sides by (-3)}\\\boxed{x=2}\\\\Answer:\ \boxed{x=2}[/tex]
Answer:
x coordinate is 2
Step-by-step explanation:
We have given,
9x - 8y = 2 .........(1)
-3x - 9y = -24 ...............(2)
We use elimination method to eliminate y.
We multiply equation (1) by 9 and equation (2) by 8.
We get,
{ 9x - 8y = 2} × 9 or 81x - 72y = 18 -------------(3)
{-3x - 9y = - 24} × 8 or -24x - 72y = -192 -----------(4)
And subtract equation (4) from equation (3)
So , (81x - 72y ) - (-24x -72y)= 18 -(-192)
or 105x = 210
or x = 210/105
or x= 2
Hence we get x coordinate as x= 2