Question

Are the following systems of linear equations? Why or why not?

1.) y=2x+15

2x-4y=12


2.) 2x-2y=12

3z-4x=18

Answer 1

all are linear eqns since they follow the formula y = mx + c

1) y = 2x +15

2) 2x -4y = 12 can be rewritten as...

4y = 2x -12 =》 y = 1/2 x - 3

3) 2x - 2y = 12 can be rewritten as...

2y = 2x - 12 =》 y = x - 6

4) 3z -4x =18 can b rewritten as...

3z = 4x - 18 =》 z = 4/3 x - 6