Ax + b = 3x -3a
Ax- 3x = -(3a+b)
x(A-3) = - (3a+b)
x = - (3a+b) / (A-3)
Answer:
The value of y is 68° .
Option (C) is correct .
Step-by-step explanation:
As the figure given in the question be as follow .
Now apply angle sumproperty in the triangle .
(According to this property the total sum of the triangle is 180°.)
y° + (y - 12)° + 56 ° = 180 °
y + y - 12 + 56 = 180
2y + 44 = 180
2y = 180 - 44
2y = 136
y = 68°
Therefore the value of y is 68° .
Option (C) is correct .