Answer:
Step-by-step explanation:
use the comparison method
3x + 1 = 3x - 3
1 = -3
the expression is false for any value of x and y , so there no solution
Answer:
it would be 21
the only difference is that one is a negative and the other is a positive. The absolute value is the distance the number is from 0 on the number line.
hope i helped :)