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Amiraneli [1.4K]
3 years ago
13

A number subtracted from 90 is 3 times that number

Mathematics
2 answers:
OleMash [197]3 years ago
7 0
90-n=3n hope this helps you
Harlamova29_29 [7]3 years ago
3 0
The equation is 90-n=3n but then to solve it you add n to both sides to get the variable on one side so then
90-n=3n becomes 90=4n and n=22.5
so the number is 22.5
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