Question

I need help with this question can anyone tell me ?

Answer 1

x = 9

Explanation:

given a line parallel to a side of the triangle and intersecting the other 2 sides, then it divides those sides proportionally.

`(x-1)/(3x+1)` =
`(6)/(21)` =
`(2)/(7)` ( cross- multiply )

7(x - 1) = 2(3x + 1) ← distribute parenthesis on both sides

7x - 7 = 6x + 2 ( subtract 6x from both sides )

x - 7 = 2 ( add 7 to both sides )

x = 9