Question

Solve for n. Explain problem solve.

N + 12= 42

Answer 1

First, subtract 12 from both sides to isolate the variable (opposite of 12 is -12). N+12-12= N, 42-12=30, so N=30.

Answer 2

For this is pretty easy all you do is
42 subtract 12 and that will give you the answer for N