ksawyer745
01.04.2021 •
Mathematics
A 12 x 18 photograph is pasted in the center of a sheet such that there is a border around it with an equal width all around the picture. Find the width of this border if it is known that the area of both the picture and the border is 280 cm^2.
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Ответ:
I got you bestie
3(a + 7) = -33
3a + 21 = -33
-21. -21
3a = -54
/3. /3
a = -18