2007-01-08 01:15:19 · 12 answers · asked by Mike B 1 in Science & Mathematics ➔ Mathematics
5x - 7(2 - 4x) = 0
5x - (14 - 28x = 0
5x - 14 + 28x = 0
33x - 14 = 0
33x - 14 + 14 = 0 + 14
33x = 14
33x / 33 = 14 / 33
x = 14/ 33
The answer is x = 14 / 33
Insert the x value into the equation
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Check
5x - 7(2 - 4x) = 0
5x - 7[2 - 4(14/33)] = 0
5(14/33) - 7[2 - 56/33] = 0
70/33 - 7[66/33 - 56/33] = 0
70/33 - 7[10/33] = 0
70/33 - [70/33] = 0
70/33 - 70/33 = 0
0 = 0
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2007-01-08 01:49:51 · answer #1 · answered by SAMUEL D 7 · 1⤊ 1⤋
First: eliminate parenthesis by using distribution > multiply -7 with both terms in the parenthesis >
5x - 7(2) - 7(- 4x)
5x - 14 + 28x
Sec: combine "like" terms >
5x + 28x - 14
33x - 14
2007-01-08 07:12:48 · answer #2 · answered by ♪♥Annie♥♪ 6 · 1⤊ 0⤋
5x-7(2-4x) = 5x-14+28x = 33x -14 =
33x = 14
x = 14/33
2007-01-08 01:21:55 · answer #3 · answered by Big C 6 · 1⤊ 1⤋
5x - 7(2 - 4x)
5x - 14 + 28x
33x - 14
QED
2007-01-08 04:56:58 · answer #4 · answered by CSUFGrad2006 5 · 2⤊ 0⤋
5x - 7(2-4x) = 5x - (14 - 28x)
=5x - 14 + 28x
=(5x + 28x) -14
=(5+28)x - 14
=33x - 14
33x = 14
x = 14 / 23
2007-01-08 01:58:52 · answer #5 · answered by Naylet M 2 · 0⤊ 1⤋
5x-7(2-4x)=
5x-14+28x=
33x-14
2007-01-08 01:26:21 · answer #6 · answered by Alex 4 · 2⤊ 0⤋
5x-7(2-4x)
=5x-14+28x
=33x-14
2007-01-08 01:20:43 · answer #7 · answered by Salih D 1 · 4⤊ 0⤋
are u sure dats d grouping bcoz it wud be sumthing else when uve got parenthesis on d 1st 2 terms...but anyway...
5x - 14 + 28x (u distribute -7 to both terms inside th () )
5x + 28x -14
33x - 14
there...
u can no longer simplify that bcoz u cant add them anymore.they are unlike terms...
2007-01-08 01:22:41 · answer #8 · answered by -Baboushckha- 2 · 2⤊ 0⤋
Are you looking to simplify it or to solve it. If either, I will show you both ways:
The first step is to use distributive property:
5x-14+28x
Combine like terms:
33x-14
If you want to solve it, add 14 to both sides:
33x=14
Divide it by 33:
x=14/33
Check:
33(14/33)=14
14=14
I hope this helps!
2007-01-08 01:22:04 · answer #9 · answered by Anonymous · 1⤊ 1⤋
5x-14+28x
5x+28x-14
33x-14
2007-01-08 01:22:06 · answer #10 · answered by kelly 3 · 1⤊ 0⤋