Question 992989
#1

x is any integer.
2x and 2x+2 are two consecutive even integers.
{{{3(2x)=-6+6(2x+2)}}}
{{{6x=-6+12x+12}}}
{{{6x=12x+6}}}
{{{0=6x+6}}}
{{{x+1=0}}}
{{{x=-1}}}
-
{{{system(2x=-2,2x+2=0)}}}
The two integers are  -2, and 0.


#2

k, how many quarters that Nora saved.  (Think, "kuarters".)
Chris:  2k+6 and also 5(k-3)
and these are supposed to be the same:
{{{2k+6=5(k-3)}}}
{{{2k+6=5k-15}}}
{{{6=3k-15}}}
{{{6+15=3k}}}
{{{3k=21}}}
{{{highlight(k=7)}}}------The amount of quarters Nora saved.


#5
This one is badly enough described that you need to rewrite it clearly.