Easy Algebra Step-by-Step

30 Easy Algebra Step-by-Step

Step 2. The signs are opposites (one negative and one positive), so make the

quotient negative.

−

=−

120

3

40

c.^120

− 3

Step 1. Divide 120 by 3.

120

3

= 40

Step 2. The signs are opposites (one positive and one negative), so make the

quotient negative.

120

3

40

−

=−

d. −^120

0

Step 1. The divisor (denominator) is 0, so the quotient is undefi ned.

−

=

120

0

undefi ned

e.^0

30

Step 1. The dividend (numerator) is 0, so the quotient is 0.

0

30

= 0

To be successful in algebra, you must memorize the rules for adding,

subtracting, multiplying, and dividing signed numbers. Of course, when you

do a computation, you don’t have to write out all the steps. For instance, you

can mentally ignore the signs to obtain the absolute values, do the necessary

computation or computations, and then make sure your result has the cor-

rect sign.