Question

10 = k + 3

tell my mistake what I have done
3 goes left

3-10 = k
-7 = k

explain what I done wrong ​

Answer 1

3 will be minus from 10.(10-3)

but you write that 10 is minus from 3 (3-10).

correct transfer of 3 on the left side ,

so

10-3=k

k=7.

Answer 2

Their is a silly mistake in your questions and by this your question become totally wrong.

The answer of this question is 7 only not - 7 and you can see the no.3 is with + not - . so the answer is 7 only.

i hope its help you.