Question 565045
I'll do the first two to get you started


# 1

{{{3+4x=3x+6}}} Start with the given equation.



{{{4x=3x+6-3}}} Subtract {{{3}}} from both sides.



{{{4x-3x=6-3}}} Subtract {{{3x}}} from both sides.



{{{x=6-3}}} Combine like terms on the left side.



{{{x=3}}} Combine like terms on the right side.



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Answer:


So the solution is {{{x=3}}} 

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# 2

{{{30-7z=10z-4}}} Start with the given equation.



{{{-7z=10z-4-30}}} Subtract {{{30}}} from both sides.



{{{-7z-10z=-4-30}}} Subtract {{{10z}}} from both sides.



{{{-17z=-4-30}}} Combine like terms on the left side.



{{{-17z=-34}}} Combine like terms on the right side.



{{{z=(-34)/(-17)}}} Divide both sides by {{{-17}}} to isolate {{{z}}}.



{{{z=2}}} Reduce.



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Answer:


So the solution is {{{z=2}}} 


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