Question 150391
I'll do the first two to get you started


# 1




{{{51-a=1}}} Start with the given equation.



{{{-a=1-51}}} Subtract {{{51}}} from both sides.



{{{-a=-50}}} Combine like terms on the right side.



{{{a=(-50)/(-1)}}} Divide both sides by {{{-1}}} to isolate {{{a}}}.



{{{a=50}}} Reduce.



----------------------------------------------------------------------


Answer:


So the answer is {{{a=50}}} 



<hr>


# 2



{{{39=u-8}}} Start with the given equation.



{{{39+8=u}}} Add 8 to both sides.



{{{47=u}}} Combine like terms on the left side.



----------------------------------------------------------------------


Answer:


So the answer is {{{u=47}}}