Question

What’s the value? 20, 32, or 41?

Answer 1

41

Explanation:

Supplementary angles sum to 180°

Sum the 2 given angles and equate to 180

3x + 2x - 25 = 180

5x - 25 = 180 ( add 25 to both sides )

5x = 205 ( divide both sides by 5 )

x = 41

Answer 2

x = 41

Explanation:

<m1 + <m2 = 180 Show the angles are supplementary

3x + 2x - 25 = 180 Substitute

5x - 25 = 180 Combine like terms on the left

5x - 25 + 25 = 180 + 25 Add 25 to both sides

5x = 205 Divide by b

5x/5 = 205/5 Do the division

x = 41