Transcript Document
1
34 x 11
3x a 4 5 2xx2a71
2
If you had this equation,
how would you move
the 7
3x 3 x 7
to the other side
of the equation?
3x 3 x 7
You would subtract it . . .
. . . wouldn’t you?
3x 3 x 7
7
7
This equation is probably
different from
other equations
you have solved.
3x 3 x 7
What makes it different?
It is different because
it has an x
on each side.
3x 3 x 7
How would you move
the x
from the right side
to the left?
3x 3 x 7
You would move the x
exactly the same way
you would move the 7.
3x 3 x 7
You would subtract it . . .
. . . wouldn’t you?
3x 3 x 7
x
x
Now when you simplify. . .
3x x ?2 x
3x 3 x 7
x
x
Now when you simplify. . .
x x ?0
3x 3 x 7
x
x
. . . the equation becomes
the type of equation
3x 3 x 7
x
x
. . . the equation becomes
the type of equation
2x 3 7
3x 3 x 7
that you already know
how to solve.
2x 3 7
3 3
that you already know
how to solve.
2x 4
2 2
that you already know
how to solve.
x2
If you want to solve
equations correctly
(Don’t
(andget
you
you?)
do)
you will
in
the habit
of checking solutions.
Checking the solution:
x 2?
3x 3 x 7
32 3 2 7 ?
6 3 9?
Try this one:
2 x 10 9 x 11
9x
9x
7 x 10 11
10 10
7 x 21
7 7
Try this one:
x 3?
2 x 10 9 x 11
23 10 93 11?
6 10 27 11?
16 16 ?
You
Okay—here’s
say you wantone
onemore.
more?
4x 7 2x 1
Did
If you
youdid,
check
youyou
know
answer?
the
solution is
x 4.