Question

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

Answer 1

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