How can I solve this in substitution, can I have a step by step. (x, y)
y=2x+1
2x-y=3

First, you have to see if there is y= or x = to substitute for the equation to find the solution.

y = 2x + 1

Rewrite the equation in slope-intercept form.

2x - y = 3 ->  y = 2x + 3

Add both equations together.                            Substitute.

    2x+1                                                               2(1)+1 = y

+   2x+3                                                                 2 + 1 = y

                                                                                  y = 3

   y=  4x + 4

     4x =4

      x  = 1

Your answer should be (1,3).

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)

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