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dolphi86 [110]
3 years ago
7

Find a number that is 15 more than 4 times its opposite

Mathematics
1 answer:
V125BC [204]3 years ago
5 0
x-\ number\\\\
x-15=4(-x)\\\\
x-15=-4x\ \ \ \ |subtract\ x\\\\
-15=-5x\ \ \ \ |divide\ by\ -5\\\\
x=3\\\\Number\ is\ equal\ to\ 3.
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