Answer:
-7-a
Step-by-step explanation:
2a-3a +5-12
-a - 7
or -7-a
21:3
9:3
3:1
there all a 3:1 ratio
Answer:
or 
Step-by-step explanation:
The given absolute value inequality is 
Divide both sides of the inequality by -2 and reverse the inequality sign:

By the definition of the absolute value function;
Either
or 
Divide through the rightmost inequality by -1 and reverse the sign.
This implies that:
or 
Answer:

Step-by-step explanation:

short explanation: 1) to add the 1st equation to the 2d; 2) to calculate the value of 'x', then to substitute x=13/5 into the 2d equation and calculate the value of 'y'.
Answer:
may be 11.6 but I am not sure
Step-by-step explanation: