Final answer:
To find mZ3, we can use the property that angles on a straight line add up to 180 degrees. Given m26 and m28, we can set up an equation and solve for x to find the value of mZ3.
Step-by-step explanation:
To find the value of mZ3, we need to use the property that angles on a straight line add up to 180 degrees.
Given that m26 is (2x - 5) degrees and m28 is (x + 5) degrees, we can set up an equation:
(2x - 5) + (x + 5) = 180
Simplifying the equation:
3x = 180
x = 60
Therefore, mZ3 is (x + 5) degrees which is equal to (60 + 5) degrees = 65 degrees.