How to write the sum of 8 and 3 times a number is 23. a
3x = 8 + 23

b
8 + 3x = 23

c
3x − 8 = 23

d
(8 + 3) x = 23

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step-by-step explanation:

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~courtney

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°

true

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