Question

solve the equation
x/3-x/7=2

Answer 1

When you are solving (there is an = sign) you find the common denominator but instead of putting it on the bottom you multiply "EVERY" term by that number.

So you common denominator is 3 * 7 = 21 so multiply each term by 21

21(x/3) - 21(x/7) = 21 * 2 The 3 cancels up into the 21, the 7 up into the 21
7x - 3x = 42
4x = 42
x = 10.5

Answer 2

:)