4 years ago

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

Mathematics

2 answers:

Elodia [21]4 years ago

7 0

Answer:

Stdivise 7 aep-by-step explanation:

Yuri [45]4 years ago

3 0

Answer:

Step-by-step 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)

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