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Let's do another one
where we get a bit of a head start:
Notice that one equation is solved
for x...
Let's stick that
x
blob into the other equation in place
of x:
This gives us
OK, we've got
y...
Now, we need x...
See the circled blob above?
Stick it in there! ( That's
why I circled it! )
Is our answer
(7, 5) ?
Let's check...
and you have to check it in BOTH equations!
So, the answer is
(7, 5).
TRY IT:
Solve by substitution:
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