|
Let's start with a problem that's
half done already... We already know what
y
is:
We just need to figure out what
the x
is. Substitution! Take the
y
guy and stick it into the first equation:
| This gives
|
 |
. Solve for
x! |
Let's double-check that:
| So, the
solution to our system is |
 |
. |
| |
|
Remember that this
is a point where two lines intersect.
TRY IT:
Solve by substitution:
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