
Tamara J. answered 11/14/12
Math Tutoring - Algebra and Calculus (all levels)
x/2 + x/6 = 2
First, you want to find a common denominator for the fractions on the left side of the equation so you can add those fractions. Since 6 is the smallest common denominator, multiply the first fraction by 3/3 to get a 6 in the denominator. That is, multiply x/2 by 3/3:
(x/2) · (3/3) = (x · 3)/(2 · 3) = 3x/6
Replace x/2 in the original equation by 3x/6:
3x/6 + x/6 = 2
Since you now have a common denominator, you can add the two fractions on the left side of the equation:
(3x + x)/6 = 2
After combining like terms, you end up at the following:
4x/6 = 2
Multiply both sides of the equation by 6:
6 · (4x/6) = 2 · 6
4x = 12
Divide both sides of the equation by 4:
(4x) / 4 = 12 / 4
x = 3

Michael B.
Nice answer.
11/15/12