Math, asked by nishi6057, 5 months ago

(? % of 280) + (18% of 550) = 143.8​

Answers

Answered by ThePensive2020
1

Answer: The unknown quantity (?) is 16.

Step-by-step explanation: Let, the unlnown variable be x.

(x% of 280) + (18% of 550) = 143.8​

or, (x/100 x 280) + (18/100 x 550) = 143.8

or, 2.8x + 99 = 143.8

or, 2.8x = 143.8 - 99

or, 2.8x = 44.8

or, x = 44.8/2.8

or, x = 16

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