Question

The system of equations y = one-fourth x minus 1 and y = negative one-half x minus one-fourth is shown on the graph below.


On a coordinate plane, 2 lines intersect at (1, negative three-fourths).

Answer 1

The solution of the system of equations is (1, -3/4)

How to solve the system of equations?

Here we have the system of equations:

y = (1/4)*x - 1

y = -(1/2)*x - 1/4

To solve it, we use the fact that the variable "y" is the same in both equations, then we can write:

(1/4)*x - 1 = -(1/2)*x - 1/4

Now we can solve that for x:

(1/4)*x - 1 = -(1/2)*x - 1/4

(1/4)*x + (1/2)*x = 1 - 1/4

(1/4)*x + (2/4)*x =  1 - 1/4

(3/4)*x = 3/4

x = 1

To get the y-value of the solution, we just evaluate x = 1 in any of the two given lines, using the first one:

y =  (1/4)*(1) - 1 = -3/4

So the solution is (1, -3/4)

If you want to learn more about systems of equations:

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