Verified Answer :

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

I think its probley 16 i dont really understand this question but im sure it is

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