Also, what is the number?
2007-02-06 19:53:01 · 9 answers · asked by fuimdrunk 1 in Science & Mathematics ➔ Mathematics
Let the number be x
2x - (x - 7) = 12
2x - x + 7 = 12
x + 7 = 12
x = 5
The number is 5.
2007-02-06 20:25:52 · answer #1 · answered by Como 7 · 0⤊ 0⤋
Write an equation: the difference when 7 less than a number is subtracted from twice the number is 12.?
Also, what is the number?
2x - (x-7) = 12
x = 5
hehehe...
CHECK
2(5) - (5-7) = 12
10 - (-2) = 12
12 = 12
2007-02-07 06:53:22 · answer #2 · answered by kuhkuhbear 1 · 0⤊ 0⤋
Sure:
12=2x-(x-7)
whereas 'x' is the numbner.
So solve as follows:
12 = 2x+7-x <--- Distribute
12=x+7 <--- Simplify
12-7=x+7-7 <---- Cancel out
5=x <--- Simplify.
5 is the number =)
2007-02-07 03:59:29 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Let x = the number
2x - (x-7) = 12
x + 7 = 12
So x = 5
2007-02-07 04:12:05 · answer #4 · answered by Q 2 · 1⤊ 0⤋
Let the number be y.
Then, according to your question,
2y - (y-7)=12
Its solution goes like this:
2y - (y-7)=12
so, 2y - y +7 = 12
so, y+7=12
so, y=12-7
so, y=5
2007-02-07 04:33:57 · answer #5 · answered by Kristada 2 · 0⤊ 0⤋
2n - (7-n)= 12
2n - 7 + n = 12
n = 19
2007-02-07 04:59:50 · answer #6 · answered by Anonymous · 0⤊ 0⤋
2x-(x-7)=12
x=19
2007-02-07 04:40:08 · answer #7 · answered by joey_ires 1 · 0⤊ 0⤋
(2x)-(x-7) = 12
i think
2007-02-07 03:58:10 · answer #8 · answered by ms.jackson... 4 · 0⤊ 0⤋
(x-7)-(2x)+12
-x-7=12
x=19
easy!!!!!!!
2007-02-07 04:07:19 · answer #9 · answered by ghsalamatbashi2000 2 · 0⤊ 1⤋