Question

Solve the system by the
substitution method.
7x + y = -6
7x - 3y = 18

Answer 1

Explanation:

7x + y = -6

y = -7x - 6

7x - 3y = 18

7x - 3(-7x - 6) = 18

7x + 21x + 18 = 18

7x + 21x = 18 - 18

28x = 0

x = 0/28

x = 0 <=========

7x + y = -6

7(0) + y = -6

0 + y = -6

y = -6 <==========

solution is : (0,-6)

Answer 2

Stdivise 7 aep-by-step explanation: