216k views
1 vote
Solve for X please show work and or formula

Solve for X please show work and or formula-example-1

2 Answers

7 votes

Answer:

x = -9

Explanation:

Notes to remember:

A triangle's angles will always add up to 180°

--------------------------------------------------------------------

As the image shows, we have two labeled angles. A 51° angle and a 65° angle.

Here's how you want to set up your equation:

180° = 51 + 65 + x + 73

(Rearrange)

180° = 51 + 65 + 73 + x

Add 51, 65, and 73

180° = 189 + x

Subtract 189 from both sides, to isolate x.

-9° = x

ALWAYS PLUG IN (the number that comes from the variable) TO CHECK YOUR WORK!

180° = 51 + 65 - 9 + 73

I hope this helped!

Sincerely,

Your friendly neighborhood

Middle School Math Teacher

User Xolve
by
7.6k points
8 votes

The sum of angles in a triangle is always equal to 180 degrees

Add:

65 + 51 + x + 73 = 180

x + 189 = 180

x = -9 That is fine that x is "-9" because this would just mean that the angle "x+73" is just bigger than it is supposed to be.

Proof:

65 + 51 - 9 + 73 = 180

Therefore, x = -9

User Jobinbasani
by
7.6k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories