Question

multiple choice question: 1. if x/2-3x/4+5x/6=21 then x =_______. a)28 b)30. c)36. d)42.​

Answer 1

x/2 - 3x/4 + 5x/6 =21

6x - 9x + 10x = 21

12

6x + 1x =21

12

7x = 21

12

x = 21 × 12

7

x = 3×12

x = 36

so option c is correct