Solution:
x/2 + x2/3 - x/5 -x2/ 4 First arrange like terms in order
x/2 - x/5 + x2/3 - x2/4 add or subtract like terms
( x/2 -x/5) + ( x2/3 - x2/4) take common denominators of 5(2) = 10, and 3(4) = 12
for the first term ( x/2 - x/5) divide 10 by the first denominator 2 = 5 and multiply by the numerator x
divide 10 by the 2nd denominator 5 = 2 and multiply by the numerator x
you get ( 5x - 2x / 10) = 3x/10
for the 2nd term ( x2/3 - x2/4) divide 12 by the first denominator 3 = 4 and multiply by the numerator x2
divide 12 by the 2nd denominator 4 = 3 and multiply by the numerator x2
you get ( 4x2 - 3x2 / 12) = x2/12
the final answer is 3x/10 + x2/12