Help please.. Math problem?

Question

Twice the sum of a number and 3 is the same as 1 subtracted from the number. find the number??

okay thanks everyone.. i have another one that im having trouble with..

one number is 6 less than another number. if the sum of the tow numberes is 150, find the numbers

Answer 1

read it and write it out as an equation as you go. Let the number you don't know be x. Twice the sum of a number and 3 is 2(x+3). Is the same as means equals. 1 subtracted from the number is x - 1. So writen out it's:
2(x+3)=x-1.... you should be able to figure it out from there....

Answer 2

Let x = the number.

Equation:
2(x + 3) = x - 1
2x + 6 = x - 1
x = - 7

Answer: the number is - 7.

Proof:
2(- 7 + 3) = - 7 - 1
2(- 4) = - 8
- 8 = - 8

Answer 3

2 (twice the sum of 1 and 3-1 is 2)

Answer 4

Turn this into an equation, where x=number

2(x+3) = x-1
2x+6=x-1
x = -7

Then to make sure, just double check it:

2(-7 + 3) = -7 - 1
2(-4) = -8
-8 = -8

so x = -7

Answer 5

Answer is -4:

2x + 3 = x - 1
2x -x = -1 -3
x = -4

Check:
2 x -4 + 3 = -8 + 3 = -5
-4 -1 = -5

Answer 6

Write out the problem algebraically:
Let the number be x.

Then you're told 2(x+3)=x-1. rearranged, this gives 2x-x=-7, which gives x=-7.

Answer 7

so : 2(x + 3) = x - 1
2 x + 6 = x - 1
2x - x = -6-1
x = -7

Answer 8

Set it up as
2(x + 3) = x - 1
2x + 6 = x - 1
2x - x + 6 = -1
x = -1 -6
x = -7

HTH

Doug

Answer 9

let x = number

2(x+3) = x-1
2x+6 = x-1
x = -7

Answer 10

2[x+3]=x-1
2x+6=x-1
2x-x=-1-6
x=-7