Solve the following equations.
System of equations
1.) Solve the following systems by graphing.
5y-15x=0
x+2y=7
2.) 2x-y=9
6x-3y=9
3.) Solve the system of equations by the elimination method.
-x+14y=27
x+14y=36
4.) 4x+y=11
x-2y=5
5.) 3x+y=5
3y=15-9x
6.) Solve the following system of equations by substitution or elimination.
16x+4y=15
4x+y=-6
7.) 3x-4y=17
8x-5y=51
8.) Use the elimination method to solve the following systems of equations.
4x-3y=-9
-3x+2y+5
9.) Solve the system of equations by the elimination method.
5/4x + 3/2y=8
1/8x- 3/4y =-1
10.) Solve the following system of equations by substitution or elimination
0.3x-0.8y=1.4
0.5x-y=-2.0
11.) Solve the following system of equations.
x-y+z=-7
4x+2y-z=10
-2x+4y-z=32
12.) x+y =2
6y=30
3x+4y-2z=7
13.) 2x+4y+z=0
-x+2y+3z=-2
x+2y+z=-2
14.) 2x+4y+z=0
-x+2y+3z=-2
x+2y+z=-2
15.) 5x+5y-20z=5
5x+y-z=9
-x-y+4z=3
16.) 4x-2y+2z=20
2x-6y+4z=18
6x+12y-3z=-6
17.) x+2y-z=10
-3x-2y-3z=8
4x+4y+5z=-16
18.) x+4z=0
7x+y=0
y-5z=0
