Respuesta :

Answer:

x = 15

Step-by-step explanation:

Angles in a triangle add up to equal 180

Hence, 3x + 5x + 4x = 180

( Note that we've just created an equation that we can use to solve for x)

We now solve for x using the equation created

3x + 5x + 4x = 180

Combine like terms

12x = 180

Divide both sides by 12

x = 15

wegnerkolmp2741o

Answer:

x = 15

Step-by-step explanation:

The sum of the angles of a triangle is 180

3x+4x+5x = 180

Combine like terms

12x = 180

Divide by 12

12x/12 =180/12

x = 15