If

is left, that means

was spent. So

of the total amount is equal to 39.. Let's say x to the total amount.
Answer:
Step-by-step explanation:
Flip the equation 1) 8a + 2b = 2x
Subtract 2b from both sides 2)8a + 2b(-2b) =<em> 2x + (-2b)</em>
Divide by 8 on both sides 3) 8a/8 =<em> -2b - 2x/8</em>
4) a = 1/-4b + 1/4x
Yes the ratio would change because it needs 3 times more than the original amount so you would multiply it by 3
Answer:

Step-by-step explanation:
1/7w-5 ???? That might be right not sure tho