Answer:
Two systems of equations are equivalent if they have the same solution(s).
Answer:Jeff read 11 books<em> I believe </em>
Step-by-step explanation:hope this helps
Add all sides.
5x+2+3x+8+4x-1
Combine like terms
12x+9
Subtract nine to get it on the other side of the equal sign
12x= -9
Divide by twelve
x=-9/12
Simplify
x=-3/4
Plug in x.
The decimal equivalent is 0.25.
Either 1 or 3 - 1 is all positive and 3 is all negative