Take a rubber band, and stretch it between the thumb and index finger of one hand. hold it there for as long as you can.

at what state is the energy in the rubber band?

as your hand gets tired, what state of energy is it fighting against?

release the rubber band from your finger. at what state is the energy in the rubber band as it is released?

a neutral ph of 7 and normal organism temperature is needed for a certain enzyme to be effective.  

what would happen to the enzyme if the ph and/or temperature fluctuate greatly from the norm?  

a.the enzyme’s hydrogen bonds will break.  

b.the activation energy will increase.  

c.more product will be formed.

d.the ideal temperature and ph for the enzyme function will decrease.  

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)