Question

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Answer 1

Answer:

x=40 .   y=133

Step-by-step explanation:

Solution:

18+ (3x-5) + (x+7) =180 --------------(Linear angles)

after opening bracets--

18 + 4x + 2 = 180

20 + 4x= 180

4x = 180 - 20

4x = 160

x = 40-------------------------------------(i)

(x+7) + y = 180------------------------(Linear angles)

Substituting (i) in the above equation

40 + 7 + y = 180

47 + y = 180

y = 180 - 47

y = 133-------------------------------------(ii)

Hence x=40 and y=133

Answer 2

Answer:

18 + (3x - 5) + (x + 7) = 180 angles --(Linear pair).

18 + 4x + 2 = 180

20 + 4x = 180

4x = 180 - 20

4x = 160

x = 40.-(i)

(x + 7) + y = 180.(Linear pair).

Substituting (i) in the above equation

40 + 7 + y = 180

47 + y = 180

y = 180 - 47

y = 133

Hence x = 40 and y = 133.