Firstly, understand prefixes :)
giga 1000000000
mega 1000000
kilo 1000
deci 0.1
centi 0.01
milli 0.001
micro 0.000001
nano 0.000000001
Your equation would be 2x - 12 + 3x - 15 = 23
Combine like terms and solve for x
Answer:
15
Step-by-step explanation:
63 dollars 3 hours
21 dollars 1 hour