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UkoKoshka [18]
3 years ago
9

The sum of twice a number and 15 is -42

Mathematics
2 answers:
zmey [24]3 years ago
7 0
2(number)+15=-42
2(number)+15-15=-42-15
2(number)=-57
2(number)÷2=-57÷2
number=-28.5
satela [25.4K]3 years ago
5 0
Assume that the number is n.
sum of twice the number and 15 means that you will first multiply the number by 2 then add 15.
the equation us:
2n + 15 = -42
2n = -42-15
2n = -57
n = -28.5
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