Solving Systems Using Elimination?

Solve each system by graphing. Graph each system on a separate sheet of paper, and submit the ordered pair in the box below.
1. y = 3x - 4
y = -2x + 1

2. y= 4/3x-2
y= 2/3x

3. y= 1/4x-1
y = -2x – 10

Solve each system using substitution.
4. y = x – 14
y = x – 10

5. y = 2x + 5
y = 6x + 1

6. x = y + 7
y = 8 + 2x

7. 3x + 4y = 12
y = -2x + 10

8. 4x + 9y = 24
y = -1/3x + 2

I'm severely confused about the formatting of these equations and have no idea of how to solve these. If you can help, thank you very much.
 
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