9x mean 9 multipled with an unkown number and 9x is subtracted from another unknown number 'y' . you can substitute with any letters you want ,but you have to use two different letters.
Step-by-step explanation:
To find the amount of miles on one gallon,

Hence, 32 miles per gallon.
The answer is 1. hope this helps
X + 5 + 4 + x + 5 = 60
2x + 14 = 60
-14 -14
2x = 46
x = 23
So, Josh's age is 23 + 4 which is 27 years old.
Answer:
12 green marbles
Step-by-step explanation:
first we know that there are 39 red and blue marbles, so 3x+10x=39 x=3
since the amount of green marbles is 4x, and we know x=3, x*4=12