Question

Solve the system of equations by graphing. 3x-y=3, 4x+y=4

Answer 1

mark x=1 and y=-3 ------(1)
mark x=1 and y=-4 ------(1)
and plot the graph :D

Answer 2

did you understand @marixoxo76 ?

Answer 3

i need two plots for each equation :/

Answer 4

so, graph them both, where they INTERSECT each other, that's where the X and Y have common values, or are equal, and thus is the answer

Answer 5

Locate each equation intercepts (x and y)
The first equation let y=0 getting x=3, then let x=0 getting y=-3
Those are the two intercepts for first equation (3,0) and (0,-3) plot that line.

Do you need further help for the second equation?

Answer 6

yes plese @radar

Answer 7

O.k I will walk you through this, we are goiing to locate the x and y intercepts for the second equation. First let y = 0 then the equation becomes 4x + 0 = 4 then 4x=4 so x = 4/4=1. That fixes the first point at (1,0) One point on the second line is (1,0) Did that make any sense??

Answer 8

Now to find the second point, let x=0 and solve for y (2nd equation)) 4x + y = 4 becomes
0 + y =4 or y=4 second point is (0,4) Your two points to graph the second line are:
(0,4) and (1.0)
Now get some graph paper and graph those two lines and @jdoe0001 has pointed out where they intersect is the solution values of x and y.

Answer 9

In my humble opinion locating those two points on each line is the easiest way to draw the line.

Answer 10

The point where they intersect is (1,0) solving by elimination method

Answer 11

After establishing the two points for each line, use a straight edge to construct the line, insure you continue the line beyond the points.