2007-10-19 16:13:26 · 13 answers · asked by Baby Gurl 2 in Education & Reference ➔ Homework Help
This is algebra. You are trying to solve for X. Which means you are trying to find out what number X is.
Because 2 and X is right next to each other, this mean you would have to multiply 2 by a number...plus 3 to get the answer of 9.
For example, try plugging in 5 as X.
2 multiplied by 5 is 10...10 plus 3 equals to 13. So 5 is not the correct answer.
But try 3.
2 mulitiplied by 3 is 6...6 plus 3 equals to 9.
2X + 3 = 9
2(3) + 3 = 9
6 + 3 = 9
2007-10-19 16:23:16 · answer #1 · answered by Anonymous · 0⤊ 0⤋
x=3
2007-10-19 23:27:17 · answer #2 · answered by dolphinlass55 1 · 0⤊ 1⤋
OK,
2X+3 = 9 is called an equation . The idea is to find the value of X in order to verify this equality.
X is called an unknown variable. Therefore , the goal is to know the exact value of X.
Resolving the equation
2X+3 = 9
we add -3 on both sides of the quality
2X+3 -3 = 9 -3
2X = 6
And then , we divide both sides by 2
2X/2 = 6/2
X=3
Now, let's replace X with its value
2*3 + 3 = 9
6 + 3 = 9
9 = 9 check!
That means the process doesn't contain any error, therefore X 's value is really 3 .
2007-10-19 23:35:55 · answer #3 · answered by Alex_a 2 · 0⤊ 0⤋
2x + 3 = 9
2x = 9-3
2x =6 (divide 6 by 2)
x =3
(when you move a number to the opposite side of the equal sign, it takes on the opposite sign. Positive numbers become negative and vice versa)
2007-10-20 01:03:59 · answer #4 · answered by jan51601 7 · 0⤊ 0⤋
2x+3=9
-3 = -3
subtract 3 from both sides
+3 and -3 cancel outs so now you have 2x=6
then u divide both sides by 2 and x is 3
2007-10-19 23:57:54 · answer #5 · answered by hehehaha_xp 2 · 0⤊ 0⤋
3 - 3 = o
always get rid of the number without the variable
9 - 3 = 6
2x = 6
6/2 = 3
3 = x
2007-10-19 23:25:53 · answer #6 · answered by Anonymous · 0⤊ 0⤋
see, such questions are solved like this:
take x to one side and everything else on the other-
2X + 3 = 9
2X= 9 - 3
2X = 6
X = 6/2= 3
X=3
---
its just an unknown number.
goodluck!
2007-10-19 23:18:51 · answer #7 · answered by sunny 3 · 1⤊ 1⤋
2x + 3-3= 9-3
2x = 6
--- ----
2 2
x=3
2007-10-20 00:03:33 · answer #8 · answered by loveisthemovement ♥ 2 · 0⤊ 0⤋
2x+3=9
2x=9-3
2x=6
x=3
2007-10-19 23:19:25 · answer #9 · answered by DC 2 · 0⤊ 1⤋
the answer is 3
2007-10-19 23:22:09 · answer #10 · answered by michelle p 1 · 0⤊ 2⤋