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solve for X, angle D, angle A, angle B​

Solve For X Angle D Angle A Angle B class=

Answer :

Answer:

3x+20+(3x-20)=180(linear pair)

or,3x+20+3x-20=180

or6x=180

orx=180÷6

x=30

D=3x+20

=3×30+20

=90+20

=110

A=3x-20

=3×30-20

=90-20

=70

B=x+20

=30+20

=50

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