Answer:
3.75
Step-by-step explanation: (Might need calculator)
You said "The sum of four times a number and negative three us twelve. What is the number? " which means 4n+(-3)=12.
4n is 4*n, to let you know.
To make it easier, you can turn 4n+(-3)=12 into 4n-3=12. From there you can complete the process:
4n-3=12
Add 3 to both sides (12+3=15) (-3+3=0, they cancel out)
4n=15
Divide both sides by 4 (15/4=3.75) (4/4=1, they cancel out)
You get=
n=3.75 or 3 3/4
Lets double check:
4n-3=12
4(3.75)-3=12
15-3=12
12=12
True. Hope this helps!