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Solve the systems of equations by substituting
2.)
3x+3y=-18
2y=x

Solve the systems of equations by substituting 2.) 3x+3y=-18 2y=x-example-1

1 Answer

3 votes

Answer:

x= 4 and y= 2

Explanation:

3x+3y= 18 (1)

2y= x (2)

from (1):

x+y= 6

y= 6-x (3)

sub (3) into (2):

2(6-x)= x

12-2x= x

-3x= -12

x= 4 (4)

sub (4) into (3):

y= 6-4

= 2

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