Answer:
$63
Step-by-step explanation:
100-30=70%
0.7*90=63
Answer 1 I think I’m not sure
The number you would subtract on both sides would be 12... but this in and of itself is not the first step. the way you would solve this is by:
combine like terms. x + 12=20
then, subtract 12 from both sides to get variable alone.
you will end up with a final answer of x=8