View Full Version : How do you solve the equation
karen1231
Jun 12, 2009, 07:40 PM
[2(x+1)+6]=10
josedelaluz
Jun 12, 2009, 08:03 PM
Distribute the 2 to get [2x+2+6]=10
Add the 2 and 6 to get 2x+8 = 10
Subtract the 8 to get 2x = 2
Divide by 2 to get x = 1
karen1231
Jun 12, 2009, 08:06 PM
Distribute the 2 to get [2x+2+6]=10
Add the 2 and 6 to get 2x+8 = 10
Subtract the 8 to get 2x = 2
Divide by 2 to get x = 1
And also -9
josedelaluz
Jun 12, 2009, 08:10 PM
What do you mean by and -9
karen1231
Jun 12, 2009, 08:13 PM
What do you mean by and -9
we are solve inequality involving absolute value
the answer is -9 or 1
josedelaluz
Jun 12, 2009, 08:19 PM
Ok so the [ ] are absolute values,
The first solution shows the positive value. The other one would be to write
-2(x+1)-6 = 10 The inside is worth the opposite values, 2 becomes -2 and 6 is -6
-2x - 2 -6 = 10 Distribute the -2
-2x -8 = 10 Add the -2 and -6
-2x = 18 Add the 8
x = -2 Divide by -2
Unknown008
Jun 12, 2009, 08:29 PM
Lol, It think you missed the last line josedelaluz..
Ok, here's what you get;
-2x=18
then
x=-9
Btw josedelaluz, where did you get that 'x = -2'?
karen1231
Jun 12, 2009, 08:31 PM
Lol, It think you missed the last line josedelaluz..
Ok, here's what you get;
-2x=18
then
x=-9
Btw josedelaluz, where did you get that 'x = -2'?
Think you
josedelaluz
Jun 12, 2009, 08:32 PM
Lol, It think you missed the last line josedelaluz..
Ok, here's what you get;
-2x=18
then
x=-9
Btw josedelaluz, where did you get that 'x = -2'?
Not sure, meant to type x = -9,
karen1231
Jun 12, 2009, 08:35 PM
Not sure, meant to type x = -9,
Its right that what I have. I just did not know how I get it.
Unknown008
Jun 12, 2009, 08:37 PM
its right that what i have. i just did not know how i get it.
What you can do is;
|2(x+1)+6| = 10
That's the same as 2(x+1)+6 = |10|
Then, you'll have two equations;
2(x+1)+6 = +10 and 2(x+1)+6 = -10
Now, you can get the answer more easily