Question

If m∠ECA=(14x−2)° and m∠ACB=(12x+8)°, then m∠ECA=

Answer 1

Answer:

Angle ECA=68°

Explanation:

To solve, set the two angles equal to each other.

14x-2=12x+8

Now, we need to make the x's go to one side of the equation. This is because we need the x's to equal something. Otherwise, we can't solve. To do this, I am going to move 12x to the right. Remember, if a number is positive on one side, it will be negative when you move it to the other.

2x-2=8

Now, we need to add two to both sides.

2x=10

Now divide both sides by 2.

x=5

Now to solve, plug in 5 for x.

14(5)-2= ?

70-2=68

Angle ECA=68°