Make the equations contain an equal co-efficient of x:
first multiplied by 7 = -14x + 42y = 42
second multiplied by 2 = -14x + 16y = -10
Subtract leaving 26y = 52
y = 2
-2x + 12 = 6
-2x = -6
x = 3
Check these values in the two original equations.
x = 4 and y = 0
x = -1.2, y = -3
(0,7)
When talking about a "system of equations", you would normally expect to have two or more equations. It is quite common to have as many equations as you have variables, so in this case you should have two equations.
By elimination: x = 3 and y = 0
x = 4 and y = 0
the answer
Solve this system of equations. 5x+3y+z=-29 x-3y+2z=23 14x-2y+3z=-18 Write the solution as an ordered triple.
a=5: c=4
x = -1.2, y = -3
To solve for two unknowns (x and y) it is necessary to have two independent equations.
x = 6 and y = -2
(0,7)
To solve an equation with three unknowns, x, y and z, you require 3 independent equations.
16
When talking about a "system of equations", you would normally expect to have two or more equations. It is quite common to have as many equations as you have variables, so in this case you should have two equations.
(2,3)