b. Solve for x:

x

3x

-- - ---- = 1

2

4

x

3x

multiply both sides by

4 -- - -- = (4)1

the least common denominator

2

4

2x - 3x = 4

simplify

-x = 4

x = -4

multiply both sides by -1

Check the Solution.

(-4)

3(-4)

substitute -4 for all x

---- - ---- = 1

2

4

-2 + 3 = 1

true

1=1

c. Solve for y:

9x + abc = yz - mno

9x + abc + mno = yz

adding mno to both sides

9x + abc + mno

---------------- = y

dividing both sides by z

z

With problems that contain more than one variable, it may not be practical to

check for truth. However, double-check your work for accuracy.

MD0837

1-11

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