Question

x=3y
3x-5y=12
solve, please?

Answer 1

multiply top eqn by 3 gives 3x=9y

Answer 2

so if 3x=9y we can put in bottom

Answer 3

9y-5y=12

Answer 4

12?

Answer 5

3x-5y=12


3(3y)-5y=12


9y-5y=12


4y = 12


4y/4 =12/4


y = 3


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x = 3y


x= 3(3)


x =9


So the solutions are x = 9 and y = 3