1) 3(x+4)=2x-18
2007-02-01 00:52:09 · 5 answers · asked by trncbeard 2 in Science & Mathematics ➔ Mathematics
3(x+4) = 2x - 18
3x + 12 = 2x -18
3x -2x = -18 -12
x = -30
2007-02-01 00:57:57 · answer #1 · answered by Steven Z 4 · 0⤊ 0⤋
3(x + 4) = 2x - 18
3x + 12 = 2x - 18
3x + 12 - 2x = 2x - 18 - 2x
x + 12 = - 18
x + 12 - 12 = - 18 - 12
x = - 30
The answer is x = - 30
Insert the x value into the equation
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Check
3(x + 4) = 2x - 18
3(- 30 + 4) = 2( - 30) - 18
3(- 26) = - 60 - 18
- 78 = - 78
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2007-02-01 09:13:03 · answer #2 · answered by SAMUEL D 7 · 0⤊ 0⤋
This is very simple.
First get rid of the brackets by multiplying everything inside the brackets by 3.
Then subtract 2x from each side to get all the x's on the one side.
Next add 12 to both sides to move all the numbers not involving x to the other side.
2007-02-01 08:56:04 · answer #3 · answered by Gnomon 6 · 0⤊ 0⤋
3(x+4)=2x-18
>3x+12=2x-18
>3x-2x=-18-12
>x=-30
2007-02-01 08:58:23 · answer #4 · answered by sleeping_beauty1976 2 · 0⤊ 0⤋
3x+12=2x-18
x=-18-12
x=-30
2007-02-01 09:36:20 · answer #5 · answered by srinu710 4 · 0⤊ 0⤋