What does x equal in the solution of the following system 4x - y = 4, 6x - 5y = -1?

Question

a. 3/2

b 2

c ½

Answer 1

Using the first equation, we find that y = 4x - 4. Substituting it into the second, we have 6x - 5(4x - 4) = -1.

Doing a bit of algebra,

6x - (20x - 20) = -1

6x - 20x + 20 = -1

-14x = -21

x = -21/-14

x = 21/14

x = 3/2

Thus, the answer is a.

Answer 2

4x-y =4

6x-5y=-1

If you are looking for the "x", then you set one number for Y first, say it: y=2. Then apply it to your formula :

-> 4x-2=4

-> 4x = 6

-> x = 3/2

-> 6x -10 = -1

-> 6x = 9

-> x= 9/6 or 3/2

Answer 3

4x-y = 4

20x-5y=20 <===then

-6x+5y=1 <===combining

14x = 21

x=21/14=3/2

So, answer is 'a'

Answer 4

a