Answer:
54 degrees
Step-by-step explanation:
Since we know that the angles are supplementary, we can set them to be equal to 180 degrees when combined.
(7x+14) + (5x-26)=180
Drop the parentheses.
7x+14+5x-26=180
Combine like terms.
12x-12=180
Add 12 to both sides.
12x=192
Divide both sides by 12.
x=16
Since the question asks for the measure of angle B, we need to plug x back into that expression to find its measure.
5(16)-26
80-26
54
Angle B has a measure of 54 degrees.
HTH :)
