1) Solve the system by elimination?

2x-y=-3

5x-4y=6

2) Solve the system by substitution?

3x-y=-1

y=2x-1

1) (-6,-9)

times the top equation buy - 4 so you cancel out the y

so it be - 8x+4y=12 no cancel out the y's

so it be - 8x=12 and 5x=6

now combined like terms to get - 3x = 36

x = - 6 now go plug that back in one of the equations to get y

y = - 9

2) (-2,-5)

now on this one you going to substitute y = (2x-1) for y in the otheir eqaution

so it look like 3x - (2x-1) = -1

do your combining of like terms and your division & you get x = - 2

now plug x in to y=2x-1 to get y = - 5