Question 210228
I'll do the first two to get you started



# 1



{{{7y+4=3-2y}}} Start with the given equation.



{{{7y=3-2y-4}}} Subtract {{{4}}} from both sides.



{{{7y+2y=3-4}}} Add {{{2y}}} to both sides.



{{{9y=3-4}}} Combine like terms on the left side.



{{{9y=-1}}} Combine like terms on the right side.



{{{y=(-1)/(9)}}} Divide both sides by {{{9}}} to isolate {{{y}}}.



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Answer:


So the solution is {{{y=-1/9}}} which approximates to {{{y=-0.111}}}. 



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# 2




{{{5c-9=8-2c}}} Start with the given equation.



{{{5c=8-2c+9}}} Add {{{9}}} to both sides.



{{{5c+2c=8+9}}} Add {{{2c}}} to both sides.



{{{7c=8+9}}} Combine like terms on the left side.



{{{7c=17}}} Combine like terms on the right side.



{{{c=(17)/(7)}}} Divide both sides by {{{7}}} to isolate {{{c}}}.



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Answer:


So the solution is {{{c=17/7}}} which approximates to {{{c=2.429}}}.