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irina1246 [14]
3 years ago
7

the sum of twice a number and 18 less than the number is the same difference between -30 and the number. What is the number?

Mathematics
1 answer:
trasher [3.6K]3 years ago
4 0
X - the number

2x+x-18=-30-x \\
3x-18=-30-x \\
3x+x=-30+18 \\
4x=-12 \\
x=\frac{-12}{4} \\
x=-3

The number is -3.
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