Is 4 a solution to the equation x + 7 = 11? Explain?

Just plug in x = 4 and see if it makes sense:

x + 7 = 11
(4) + 7 = 11

Yes, 4 is a solution (the only solution).

x + 7 = 11
4 + 7 = 11

Thus x = 4

Or
x + 7 = 11
x = 11 - 7
x = 4

that's a misuse of the factor Theorem. once you have 2 factors a*b = 0, then you certainly can end that the two a = 0 or b = 0. while a product is 0, then some factor should be 0. yet that is beginning with a*b = 18. Eric is asserting which potential a = 18 or b = 18. What do you think of? If 2 numbers multiply mutually to be 18, does that mean between the numbers should be 18? are you able to think of of numbers which multiply mutually to make 18, yet neither selection is eighteen?

slam alikooom :

yes it is (4) .... why ?

because x + 7 = 4 + 7

so , 7 equle 7 in the other side
and x must equle 4 on the other side...

regards..

For this you want to get 'X' by its self, The only way to do that is to subtract 4 from both sides. so it would be : x=11-4 x=7

x + 7 = 11
x = 11 - 7
x = 4

yes.

substitutes 4 into the equation wherever you see x, so that you get:

4 + 7 = 11

this is true... 4 and 7 do equal 11, therefore 4 is the solution because it 'satisfies' the equation, in other words, the equation makes sense when you use 4 as a solution.

yes, according to the property of substitution, x=4
so 4+7=11

x+7=11, x=11-7=4.
Yes ur right.