5x-15-2x=6
3x=21
x=7
Therefore, x must equal 7.
For this case we must simplify the following expression:

We eliminate the parentheses taking into account that:

So, we have:

We add similar terms taking into account that:
Different signs are subtracted and the sign of the major is placed:

Answer:

Answer:
I think its D
Step-by-step explanation:
It is between A&D but it just depends on if it says equal to or not and if not then it's D
3 and -3 are said to be the square roots of 9. A square root is written with a radical symbol √ and the number or expression inside the radical symbol, below denoted a, is called the radicand. ... Negative numbers don't have real square roots since a square is either positive or 0.
1580 I assume srry if it is incorrect