Solve the following system of equations using the substitution method.



x=2y

2x+5y=9



x=

and

y=

X=2y

2x+5y=9

substitute the x=2y into the second equation

2 (2y) + 5y=9

multiple the 2y by 2. 4y+5y=9

combine like terms. 9y=9

divide the 9 out from both sides. y=1

plug the y back into the first equation

x=2 (1)

multiply. x=2

your answer is: x=2

y=1