Answer:
Each base angle would measure 69 degrees. The value of x would be 33.
Step-by-step explanation:
In order to find the value of a base angle in an isosceles triangle, we subtract the vertex angle from 180 and then divide by 2.
180 - 42 = 138
138/2 = 69 degrees
Now to find the value of x, we set 69 equal to the measure.
2x + 3 = 69
2x = 66
x = 33
