First, we know that y is equal to -8x, so we can move the -8x to replace y in the first equation, then in the first equation we get -8x=6x-14, subtract 6x on both sides, -14x=-14, x=1
Answer:
44.58
Step-by-step explanation:

The percent decrease is 80% or 80 percent
Answer:

Step-by-step explanation:
Given

Required
Simplify
To do this, we apply laws of indices:

So:

Add the exponents
