Question

find the value of x of this question plz explain it to me step by step​

Answer 1

Answer:

x=40⁰

Step-by-step explanation:

==> (2x+40)⁰ + (x+20)⁰ =180⁰ (since it is a straight line so it'll form a straight angle)

==> 2x+40+x+20=180⁰

==>3x+60=180⁰

==> 3x=180-60

==>3x=120⁰

==> x= 120/3

==> x=40⁰

therefore, first angle

= 2x+40

=2×40+40

=80+40

=120

second angle

= x+20

=40+20

=60⁰

Verification:

first angle + second angle =180⁰

120⁰+60⁰=180⁰

180⁰=180⁰

LHS = RHS

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Answer 2

Answer:

We know that 2x + 40° + x +20° = 180° (linear pair)

3x + 60° = 180°

x = 120°/3

x= 40°