2007-12-17 15:02:59 · 9 answers · asked by bazomp 1 in Science & Mathematics ➔ Mathematics
3x = 5x - 7(1 - 2x)
First, distribute 7 across the parenthetical expression.
3x = 5x - (7 - 14x)
Then apply the subtraction across the terms inside parentheses.
3x = 5x - 7 + 14x
Now just combine like terms and solve using simple algebraic techniques. You need to get a single x term on one side of the equation, and a number on the other. Then divide both sides by the coefficient of x to get your answer, x equals some number.
2007-12-17 15:06:11 · answer #1 · answered by DavidK93 7 · 0⤊ 1⤋
3x = 5x - 7(1 - 2x)
Distribute the -7 with 1 and -2x.
3x = 5x - 7 + 14x
Add like terms (5x + 14x).
3x = 19x - 7
Move all like variables to one side.
-16x = -7
Divide by -16.
x = 7/16
Check answer:
3(7/16) = 5(7/16) - 7(1 -2(7/16))
1.3125 = 1.3125
1.3125 = 7/16
2007-12-17 23:11:01 · answer #2 · answered by Anonymous · 1⤊ 1⤋
3x=5x-7(1-2x)
-7(1-2x) = -7+14x
5x+14x-7
19x-7=3x
minus 3x add 7
16x = 7
7/16 = x
2007-12-17 23:06:52 · answer #3 · answered by ? 3 · 1⤊ 1⤋
3x=5x-7+14x
16x=7
x=7/16
2007-12-17 23:05:48 · answer #4 · answered by someone else 7 · 1⤊ 1⤋
3x=5x-7(1-2x)
3x=5x-7+14x
3x=16x-7
7= 16x
x= 7/16
2007-12-17 23:07:59 · answer #5 · answered by Anonymous · 1⤊ 1⤋
3x = 5x - 7(1-2x) MOVE 5x to the other side making it NEGATIVE
3x-5x=-7(1-2x) SUBTRACT 5x from 3x
-2x = -7(1-2x) MULTIPLY 1 and -2x by -7
-2x= -7 + 14x MOVE 14x to other side making it NEGATIVE AGAIN
-2x-14x=-7 Subtract 14x from -2x
-16x = -7 Divide -7 by -16
x= -7/-16
x= 7/16
2007-12-17 23:08:00 · answer #6 · answered by Anonymous · 1⤊ 1⤋
even if it is cheating,
3x=5x-7+14x
16x=7
x=7/16
2007-12-17 23:06:50 · answer #7 · answered by Alucard 3 · 1⤊ 1⤋
homework qn huh..??
3x=5x-7+14x
3x=5x+14x-7
3x=19x-7
7=19x-3x
7=16x
7/16=x
there u go =)
2007-12-17 23:11:50 · answer #8 · answered by ice 1 · 1⤊ 1⤋
3x=5x-7(1-2x
3x=5x-7-14x
3x=-9x-7
12x=-7
x=-7/12
2007-12-17 23:06:52 · answer #9 · answered by thats right, im da best 2 · 0⤊ 1⤋