Question

6x-6y=18 and 2x + 3y = 36 by substitution method​

Answer 1

Answer:

x = -27  y =30

Step-by-step explanation:

6x-6y=18                 ----> EQUATION 1

2x + 3y  =36            ----> EQUATION 2

6x-6y=18

6x = 18 + 6y

x = 18 - 6y / 6

Substitute the value of x in equation 2

2x + 3y = 36

2 ( 18 - 6y / 6) + 3y = 36

18 - 6y / 3  + 3y = 36

18 - 6y + 9y / 3 = 36

18 + 3y / 3 = 36

cross multiply

18 + 3y = 108

3y = 108 - 18

3y = 90

y = 30

x = -27

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Answer 2

Answer:

x = 9

y = 6

Go through the above image

Hope it helps!!