Question

HELPPPPPPPPPPPPPPP!!!!!!!!!

Answer 1

Answer: (1/4,-5) $x=1/4, y=-5$

Step-by-step explanation:

Again, substitution is just plugging in a value(either x or y) in terms of its opposite(x or y). In this case, we are given x in terms of y, so we can plug in the value of y from the first equation into the second one and solve.

Solving:

Given: $y=-4x-4, -4x-2y=9$

Use first equation and plug it into second:

$-4x-2(-4x-4)=9$

$-4x+8x+8=9$

$4x+8=9$

$4x=1$

---     ---

$4$       $4$

$x=1/4$

Now plug in x into to first equation to get y!

$y=-4x-4$

$y=-4(1/4)-4$

$y=-5$

That's it!