Question

I need to know how to do these

Answer 1

I'll do one, you can use it as a basis for your answer.

$7x ^{2} + 6 = 13$

Subtract 6 from both sides to get X by itself.

$7x ^{2} = 7$

Now we divide by 7 for both sides as well.

$x {}^{2} = 1$

Now we find the square root of 1 to figure out X.

$\sqrt{1} = 1$

Therefore, X=1.

my first answer in about a month. hope this helped.