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  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
NOTE:
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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