Question

Find x (4x) (5x) (3x)

Answer 1

All three of these angles will add up to 180.

Set up an equation so all three will add to 180:

$4x + 5x + 3x = 180$

Combine like terms:

$12x = 180$

Divide both sides by 12:

$x = 15$

x will equal 15.