Question 640554
# 1


{{{3x-y=7}}}


{{{-y=7-3x}}}


{{{-y=-3x+7}}}


{{{y=(-3x+7)/(-1)}}}


{{{y=(-3x)/(-1)+(7)/(-1)}}}


{{{y=3x-7}}}


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# 2

{{{5y-10+y=7y+18-5y}}} Start with the given equation.



{{{6y-10=7y+18-5y}}} Combine like terms on the left side.



{{{6y-10=2y+18}}} Combine like terms on the right side.



{{{6y=2y+18+10}}} Add {{{10}}} to both sides.



{{{6y-2y=18+10}}} Subtract {{{2y}}} from both sides.



{{{4y=18+10}}} Combine like terms on the left side.



{{{4y=28}}} Combine like terms on the right side.



{{{y=(28)/(4)}}} Divide both sides by {{{4}}} to isolate {{{y}}}.



{{{y=7}}} Reduce.



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Answer:


So the solution is {{{y=7}}}