Question

What is the answer? (Tip- to undo multiply both sides by 4/7)

x|4/7 = 28

Answer 1

`(x)/((4)/(7))=28\\\\((x)/((4)/(7)))*(4)/(7)=28*(4)/(7)\\\\x=(28*4)/(7)=(4*7*4)/(7)=(16)/(1)\\\\\\x=16`

Answer 2

x / |4/7| = 28

Multiply by |4/7|

x = |4/7| x 28

Ignore the absolute for a second and note 4/7 x 28 is 16 because...
28 / 7 = 4
4 x 4 = 16

x = |16|