Answer:
y = 20
Step-by-step explanation:
The measure of angle A is such that the sum of the two congruent base angles and A is 180°.
2(25°) +(3y+70)° = 180°
3y +120 = 180 . . . . . . . . . . . divide by ° and simplify
3y = 60 . . . . . . . . . . . . subtract 120
y = 20 . . . . . . . . . .divide by 3
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The value of x is 5.
