4x-(2x-1)=2?

2008-02-07 3:54 am

回答 (12)

2008-02-10 7:31 pm
✔ 最佳答案
2x + 1 = 2
2x = 1
x = ½
2016-12-29 5:34 pm
5/4x + a million/4x = 2x + a million/2 + 3/4x --------- multiply the eq. by utilising 4 x 5 + a million = 8 x^2 + 2 x + 3 6 = 8 x^2 + 2 x + 3 8 x^2 + 2 x – 3 = 0 8 x^2 + 6 x – 4 x – 3 = 0 2 x ( 4x + 3) – a million(4x + 3) = 0 (2 x – a million)(4x + 3) = 0 consequently (2 x – a million) = 0 then x = a million/2 or (4x + 3) = 0 then x = – 3/4
2008-02-07 4:38 am
4x - (2x - 1) = 2
4x - 2x + 1 = 2
2x + 1 = 2
2x = 2 - 1
2x = 1
x = 1/2
2008-02-07 4:08 am
x-1/2 because first you have to figure whats in the parentheses. You have to substitute a number for x. Lets try the number 1. 2x1=2-1=1. Now 4x1=4. Finally, you try 4-1=3. That's to big so now lets try 1/2.

2/1x1/2=2/2=1-1=0. Now do 4/1x1/2=4/2=2. Finally we do 2-0 which clearly equals 2.
2008-02-07 4:06 am
4x-(2x-1)=2
8x-4x=2
4x=2
/4 /4

x=0.5
2008-02-07 4:06 am
4x-2x-1=2
2x-1=2
add 1 to both sides
2x=3
x=1.5
2008-02-07 4:04 am
4x-2x+1=2
2x=1
x=1/2
2008-02-07 3:58 am
Simplifying
4x-2x+1 = 2
2x + 1 = 2
2x = 1
x = 1/2

Verfification:
if x =1/2
4x is 2
2x -1 is 0
difference is 2
Hence verified.
2008-02-07 3:57 am
"I'll take poorly worded do-my-homework problems for $300, Alex."

To solve this for x, distribute the minus sign in front of the parentheses. Then subtract 1 from both sides. Combine the 4x - 2x on the left. Then divide both sides by 2.
2008-02-07 3:57 am
4x - 2x + 1 = 2
2x = 1
x = 1/2


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