please help!!!
6=9-(4x-11) x=???
2007-11-21 07:43:18 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
6=9-(4x-11)
=> 9-6= 4x-11
=> 3=4x-11
=>14=4x
x=3.5
2007-11-21 07:46:41 · answer #1 · answered by kamal d 3 · 0⤊ 0⤋
implifying
6 = 9 + -1(4x + -11)
Reorder the terms:
6 = 9 + -1(-11 + 4x)
6 = 9 + (-11 * -1 + 4x * -1)
6 = 9 + (11 + -4x)
Combine like terms: 9 + 11 = 20
6 = 20 + -4x
Solving
6 = 20 + -4x
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '4x' to each side of the equation.
6 + 4x = 20 + -4x + 4x
Combine like terms: -4x + 4x = 0
6 + 4x = 20 + 0
6 + 4x = 20
Add '-6' to each side of the equation.
6 + -6 + 4x = 20 + -6
Combine like terms: 6 + -6 = 0
0 + 4x = 20 + -6
4x = 20 + -6
Combine like terms: 20 + -6 = 14
4x = 14
Divide each side by '4'.
x = 3.5
Simplifying
x = 3.5
2007-11-21 12:27:29 · answer #2 · answered by Anonymous · 0⤊ 0⤋
6 = 9 - (4x - 11)
6 = 9 - 4x + 11
6 = - 4x + 20
4x = 14
x = 7/2
that's it!
2007-11-21 07:47:10 · answer #3 · answered by Marley K 7 · 0⤊ 0⤋
6 = 9 - (4x -11)
6 = 9 - (4x) - (-11)
6 = 9 - 4x + 11
6 = 20 -4x
20 - 6 = 4x
4x = 14
2x = 7
x = 7/2
2007-11-21 07:48:40 · answer #4 · answered by sayamiam 6 · 0⤊ 0⤋
6=9-(4x-11)
6-9= -4x+11
-14 = -4x
7/2=x
2007-11-21 07:56:29 · answer #5 · answered by cpttango30 5 · 0⤊ 0⤋
6=9 - (4x^2 -11x) <-- multiply the bracket by x
6=9- 4x^2 + 11x <-- multiply bracket by -1
4x^2 - 11x - 3 = 0 <-- bring everything to one side
now, look at factors - for 4, it's (1x4 and 2x2) and for 3 its (3x1) so, what i can guess is -3x4+1x1 = -11
so we have:
(4x+1)(x-3)=0 <-- factor the left side
expand to make sure (you can skip this step if you're confident enough):
4x^2 -12x + x -3 = 0 becomes 4x^2 - 11x -3 = 0 so the factoring was correct!!
(4x+1)(x-3)=0 is the factor that will get us our answers - we need to get the left side equal to zero for the answers - to do this, x has to make either 4x+1 zero or make x-3 zero.
to make 4x+1 = 0, make x = -1/4
(in case you're wondering, 4x+1=0 --> 4x=-1 --> x=-1/4)
to make x-3=0, make x = 3
Our answers are :
x = -1/4 and x = 3
2007-11-21 07:56:54 · answer #6 · answered by Moe S 3 · 0⤊ 0⤋
6=9-(4x-11)
4x-11=3
4x=14
x=7/2
2007-11-21 07:54:31 · answer #7 · answered by Anonymous · 0⤊ 0⤋
6=9-(4x-11) x=???
6-9=-4x^2 -11x
4x^2+11x-3=0
use -> x=-b+- sqrt(b^2-4*a*c) and then you get two results
cursos de ccoo 2017
2016-02-16 19:50:07 · answer #8 · answered by Anonymous · 0⤊ 0⤋
6=9-4x+11
6=20-4x
-14=-4x
-14/-4=-4x/-4
3.5=x
2007-11-21 07:54:56 · answer #9 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋