Question

1.

Answer 1

Answer:

1)

x = 1

y = -3

2)

x = 3 or x = -3

Step-by-step explanation:

1)

System of equations, we plug in y to the second equation

$4x + 2(4x-7) = -2\\4x+8x-14 = -2\\12x = 12\\x=1$

We then plug x back into the first equation to find y

$y = 4(1) -7\\y = -3$

2)

$4x^2 +3=39\\4x^2=36\\x^2=9\\x=3, -3$