Question

find value of x if ABCD is a parallelogram.A is 3y,B is 2y-5,C is 3x+3 and D is not given

Answer 1

Angle A= 3y°
Angle B= 2y-5°
Angle C= 3x+3°
now Quadrilateral ABCD is a parallelogram then

Angle B=Angle D

Angle D = 2y-5°

angle A+angle B=180
3y+2y-5=180°........................ adjacent angles of a parallelogram
are supplementary

5y=180+5
y=185/5

y=37°

Angle A=37*3
=111°

Angle A= angleC................... opposite
angles of
parallelogram
Angle C=111°................1

but

angleC=3x+3.................2

3x+3=111.....................from 1 and 2
3x=108

x=36

Answer 2

I hope u will understand this