Answer:
Step-by-step explanation:
First we would have to get x and y-values by solving systems of equations:
isolate one of the variable from any of the first 2 equations given:
-2x+ y =6 would be y = 2x + 6 when y is isolated.
now plug this equation in for the y given in the second equation:
-7x -4(2x + 6) = -8
Now solve to get the x-value,
-7x - 8x - 24 = -8
-15x - 24 = -8
-15x = 16
<u>x = </u><u> or -1.06</u>
To solve for y-value, substitute the gotten x-value in any of the 2 equations and solve:
y = 2() + 6
<u>y = </u><u> or 3.86</u>
Now that we have the x and y-values, substitute them in for the 3 equation given:
-9(<u>)</u> -3( )
=> <u> or -21.2 = Final Answer</u>
Hope this helps!