A) 3x+4=21
3x=21-4
3x=17
x=17÷3
x= 5.7
Answer:
5 and 2/5 liters or 5.4 liters
Step-by-step explanation:
9/10 times 6
9 times 6 is 54. 54 divided by 10 is 5.4 which is the same as 5 and 2/5
Cut it in half (the top into a trapezoid and the bottom into another trapdoors then solve both and add them