Expert Answers
jihyunkim67 eNotes educator| Certified Educator

I am glad that you asked this question and that is an easily solved mathematical problem since this is just a simple algebraic equation. The unknown variable here is obviously x and you are looking for the value of x when x +2 =11. Simple addition and subtraction is all you need in this equation.

To get the value of x, you subtract 2 from each side. It will give you

x+2=11

x+2-2=11-2

x=9

The value of x is 9. 

To double check you could try plugging in the value of x you got back into the equation and see if the math works. This double checking by plugging method works not only in this case but in most of algebraic question. 

davidmason9876 | Student

9

taangerine | Student

x + 2 =11

This is addition, and what is the opposite operation of addition? (Subtraction). Subtract both sides by 2 to isolate x.

x=11-2

x=9

givingiswinning | Student

x + 2 =11

subtract 2 

x +2 - 2 = 11 - 2

x = 9

atyourservice | Student

x + 2 =11

subtract 2 on both sides:

x +2 - 2 = 11 - 2

x = 9

jess1999 | Student

X + 2 = 11 : 

To solve this equation ,  we have to get " x " alone. In order to get " x " alone subtract 2 on both sides

By subtracting 2 on both sides , you should get

X = 9 which is your answer

paintmeblue | Student

subtract 2 on both sides of the equation.

so it'd be x+2-2 = 11-2

11-2 is 9.   9 is your answer

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