Question

how do you solve by substitution and graphing with this equation:
eq 1: y= 1/2x + 4
eq 2: y= -x - 5

Answer 1

Take equation (2). Substitute the value of y in equation (1). You will get an equation in x. Solve for x. Then, solve for y using equation (2).

Answer 2

To solve by graphing, you should find the x and y intercepts for both equations, graph the lines and find the point of intersection.

Answer 3

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Answer 4

Im confused still. When i add the opposite to 1/2x to get x by itself, i get so confused with all the fractions

Answer 5

substituting equation (2) in equation (1), you get:
-x - 5 = 1/2 x + 4
So, rearranging, you have:
1/2 x + x = -5-4
3/2 x = -9
x = -6

Answer 6

y = 1/2 X + 4 , y = -X + 5 ,

1/2 X + 4 = -X +5 ,

3/2 X = -9 ,

X = 2 ( -9) / 3 = -6 ---> y = 1