1243 xx 114721 xx 325 aa

733 xx

If you had this equation,how would you move

the 7

to the other sideof the equation?

733 xx

You would subtract it . . .. . . wouldn’t you?

733 xx7 7

This equation is probablydifferent from

733 xx

other equations you have solved.

What makes it different?

733 xx

It is different becauseit has an x

on each side.

How would you move

733 xx

the xfrom the right side

to the left?

You would move the x

733 xx

exactly the same wayyou would move the 7.

You would subtract it . . .

733 xxx x

. . . wouldn’t you?

Now when you simplify. . .

733 xxx x

?3 xx xxx 23

Now when you simplify. . .

733 xxx x

0 xx ? xx

. . . the equation becomes

733 xx

the type of equation

x x

. . . the equation becomesthe type of equation

732 x733 xx

that you already knowhow to solve.

732 x3 3

that you already knowhow to solve.

42 x2 2

that you already knowhow to solve.

2x

If you want to solve equations correctly

(and you do)(Don’t you?)you will get in the habitof checking solutions.

Good solution! ?72323

Checking the solution:

733 xx?2x

?936

Try this one:

119102 xxx9x9

11107 x10 10

217 x7 7

Good solution!

Try this one:

3x ?3x119102 xx

Check your work !

?11391032 ?1127106

?1616

You say you want one more?

1274 xx

Okay—here’s one more.

Did you check you answer?If you did, you know the solution is

.4x