4x=28
2007-08-09 10:27:34 · 6 answers · asked by trusofty 1 in Science & Mathematics ➔ Mathematics
This means 4 times a number called x = 28 and you have to find the number x.
Answer is x = 7
2007-08-09 10:39:53 · answer #1 · answered by Como 7 · 3⤊ 0⤋
What you are trying to do is solve for x.
That means that the value of x is unknown, but with the equation you are given, you can figure it out.
4x=28 divide both sides by 4 to get x by itself
x=7
Whenever you have a problem like this, you need to get x by iteself. To do this, whatever you do to the side x is on, you have to do the same thing to whatever is on the other side of the equals sign. Usually, you need to subtract something or divide something.
2007-08-09 17:34:12 · answer #2 · answered by Larry C 3 · 0⤊ 0⤋
4 goes into 28 how many times?
x will be the the answer to the division problem, or 7.
x will be 7.
the same for x+16= 20; solve the addition problem and you will have x. this goes for subtraction and multiplication as well.
2007-08-09 17:33:46 · answer #3 · answered by henry d 5 · 0⤊ 0⤋
7
2007-08-09 17:35:18 · answer #4 · answered by Anonymous · 0⤊ 2⤋
The 4x means four times x. To solve equations, just do the opposite to what is done, to both sides of the equation; do adding or subtracting first, then multiplying or dividing. In this case, there's no adding or subtracting; the opposite of times is divide, so divide both sides by 4, leaving you with x = 7. To check, just substitute your answer back into the original equation and see if it works.
2007-08-09 17:33:51 · answer #5 · answered by TitoBob 7 · 0⤊ 0⤋
x = 28/4
x = 7
If you have any problem like this: #x = Number, you simply divide the Number by the # and you get the value of x.
2007-08-09 17:31:45 · answer #6 · answered by Maggie82 2 · 0⤊ 0⤋