can some one explain to me how to solve this problem?? 7x=20+4x?

Answer 1

Subtract 4x from both sides.

7x - 4x = 20 +4x -4x

3x = 20

Divide by 3

ANSWER : x = 20/3

Answer 2

just using substitution always helps

if X = 1 then 7x=20+4x would be 7 = 24 (obviously incorrect)
if X = 2 then 7x=20+4x would be 14 = 28 (wrong again)
if X = 3 then 7x=20+4x would be 21 = 32 (still wrong)
if X = 4 then 7x=20+4x would be 28 = 36 (note incrementals)
if X = 15 then 7x=20+4x would be 105 = 80
if X = 30 then 7x=20+4x would be 210 = 140
if X = 100 then 7x=20+4x would be 700 = 420
Unsolvable

Answer 3

Problem: 7x=20+4x

1) Subtract 4x from both sides.
(7x-4x=3x and 20+4x-4x=20)
You're left with 3x=20

2) Divide 20 by 3 to get x.

Answer 4

7x = 20 + 4x
=> 7x - 4x = 20
=> 3x = 20
=> x = 20/3 = 6.66666666666666666666......

Answer 5

First transfer 4x to the left with opposite sign
7x - 4x = 20, then perform the operation:
3x = 20
Then make the division by 3.
x = 20/3 this is your answer.

Answer 6

Start by combining like terms. In this case, subtract 4x from each side. That will give you 3x = 20. Now divide both sides by 3. That gives you x = 20/3 = 6 2/3 = 6.666...

Answer 7

7x = 20+4x

Move all the x's to one side of the "=" sign
When you move the +4x to the other side of the "=" sign it becomes negative (ie -4x)

So
7x - 4x = 20

(You can take 4x from 7x)
So
3x = 20
So to get 1x (or just "x") divide both sides of the "=" sign by 3
So
x = 20 divided by 3
x = 20/3

Thats it

Answer 8

minus the 4x to the left side of the equal sign making it:

3x=20

Then divide both sides by 3 cancelling the 3's making it: x=20/3

so your answer would be 20 divided by 3 or 6.666666 etc.

Answer 9

7x-4x=20
3x=20
x=20/3
x=6 2/3 or 6.67

Answer 10

7x=20+4x
7x-4x=20
3x=20
x=6.666`