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SVEN [57.7K]
4 years ago
14

50 point if u due right plzzz

Mathematics
1 answer:
Tresset [83]4 years ago
7 0

The diagonals of a square bisect one another and are perpendicular.

so 21x+ 16.5 = 90

subtract 16.5 from each side

21x = 73.5

divide by 21 on each side

21x/21 = 73.5 /21

x = 3.5

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