We can find the solution to this system of equations by
the elimination method.
Step 1: Subtract 2 from both sides
of 4x + 18y +2 = 0
The equation becomes 4x + 18y =
-2
Step 2: Multiply all terms in the equation 4x + 18y =
-2 by -4
The equation becomes -16x -72y =
8
Step 3: Writing both equations in a vertical format,
combine as follows:
16x + 14 y =
-8
-16x - 72y = 8
0x - 72y
= 0
-72y =0
Dividing by -72,
y=0
Substitute 0 for y in the first equation and
solve for x as follows:
16x + 14y =
-8
16x + 14(0) = -8
16x + 0 =
-8
16x = -8
Dividing by
16, x = -1/2
Therefore our solution is {(-1/2,
0)}
We can check our answers by substituting the
values for x and y into both equations.
16x + 14y =
-8
16(-1/2) + 14(0) = -8
-8 =
-8
4x + 18y + 2 =0
4(-1/2) +
18(0) + 2 = 0
-2 + 0 + 2 =
0
0=0
Eliminating is my
favorite part of solving equations!
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