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Murrr4er [49]
3 years ago
10

Doubles minus one to solve 8+7

English
2 answers:
Nastasia [14]3 years ago
7 0
I think its probley 16 i dont really understand this question but im sure it is
ziro4ka [17]3 years ago
4 0
2 times x(the unknown number to solve for) minus 1 equals 8+7
2x-1=8+7  8+7=15
2x+1=15  Now we have to get x by itself
In order to do that you add 1 from both sides
2x=16 Then you divide 2 from both sides
x=16/2
x=8

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