Answer:

Step-by-step explanation:
Answer: y=5, x=4
Step-by-step explanation:
3y= 15 divide both sides by 3
Y= 5
4x = x+12 subtract x from both sides.
3x = 12 divide both sides by 3
X= 4
Answer:
42
Step-by-step explanation:
Answer: 80 cm
Step-by-step explanation:
2.4 divided by 3 is 0.8
To convert m to cm multiply by 100
100 x 0.8 = 80