Answer:
Step-by-step explanation:
Answer:
x=7
Step-by-step explanation:
3x-9=12
add 9 to both sides
3x=21
divide both sides by 3
x=7
12000m=12km
3l=0.003cl
7000ml= 7l
1kg=1l
1100cl=11L
7000L = 7k
9cl=90ml
6g=600 cg
Answer:
6
4
Step-by-step explanation:

The sign at the end changes because both sides of the equation are being divided by a negative number.