Answer:
242
Step-by-step explanation:
because i need trust in my life
Answer:
x=5
Step-by-step explanation:
3.2x+4=20
Subtract 4 from both sides
3.2x=16
divide by 3.2
x=5
Mentally
As they are numbers which you can do mental math with since they are whole numbers.
On scientific thing that can be solved through the use of technology is Pollution.