Question

Set up the equation to solve for x

Answer 1

The three inside angles of a triangle need to equal 180 degrees.

Add the 3 equations together and set to equal 180:

7x+4 + 5x+3 + 2x+5 = 180

Simplify by combining the like terms:

14x + 12 = 180

Subtract 12 from each side:

14x = 168

Divide both sides by 14:

x = 168/14

x = 12