

Solve for y

let's put our equation first

Flip the equation

Now follow the rule of 


_________________________

_________________________



add
to both sides

Divide both sides by 


would equal 
Answer:
5/8
Step-by-step explanation:
Answer:
8q + 6 = 8*2 + 6 = 16 + 6 = 22
So the equation looks like this : 15*3x=78
subtract 15 from both sides: -15 -15
then divide by 3 from both sides
to isolate the variable: 3x=63
3/3x=63/3
x=21 (your mystery number is 21)