2 years ago

Find the value of y

1 answer:

S_A_V [24]2 years ago

7 0

B I promised because listen to me I got you aske me

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Dvinal [7]

supplementary angles add up to 180°.

x = measure of such angle

x + 20 = measure of her sibling.

since "x" has 20 less than her sibling, then clearly her sibling has to have 20 more than "x".

$\bf (x)+\stackrel{sibling}{(x+20)}=180\implies 2x+20=180\implies 2x=160 \\\\\\ x=\cfrac{160}{2}\implies x=80$

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miss Akunina [59]

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MakcuM [25]

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