What is x + 2 =11?  

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jihyunkim67's profile pic

jihyunkim67 | High School Teacher | (Level 1) Assistant Educator

Posted on

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. 

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taangerine | Student, Grade 12 | (Level 1) Valedictorian

Posted on

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

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jess1999 | Student, Grade 9 | (Level 1) Valedictorian

Posted on

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's profile pic

paintmeblue | Student, Grade 11 | eNotes Newbie

Posted on

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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