Question

What inverse operation should be used to isolate the variable in the equation x+11=15?

Answer 1

The operation should be substracting 11 from both sides of the equation.

x=4

Explanation:

We have the equation

`x+11=15`

We have to apply an operation to isolate x.

The operation should be substracting 11 from both sides of the equation:

`x+11+(-11)=15+(-11)\\\\x+(11-11)=15-11\\\\x+0=4\\\\x=4`