Jane has $7 and her sister had $2. their parents have each of them an equal amount of money. then, jane had twice as much money as her sister. how much money did their parents give each of them?

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  $3

Step-by-step explanation:

The difference in the amounts doesn't change when each girl is given the same gift. That difference is $5. If Jane ends up with twice the amount her sister has, and that is $5 more, then Jane ends up with $10 and her sister ends up with $5.

$3 was given to each girl.

If x is the amount given to each girl, the equation can be ...

  (x+7)/(x+2) = (2)/(1)

  x +7 = 2x +4 . . . . multiply by (x+2)

  3 = x . . . . . . . . subtract x+4

  $3 was given to each girl.

answer:

the position of equilibrium will shift to the left.

step-by-step explanation:

the general equation for the dissociation of a weak base is

b + h₂o   ⇌   bh⁺ + oh⁻

according to le châtelier's principle, when a stress is applied to a system at equilibrium, the system will respond in a way that tends to relieve the stress.

if you apply a stress by adding more bh⁺ or oh⁻,   the system will respond by moving in a direction that gets rid of the added ions.

the position of equilibrium will shift to the left, forming more of the undissociated base.