MarkOfAmnael MarkOfAmnael

27-01-2017
Mathematics

Answered

y = 7x + 7

y = -7x + 19

Solve the system algebraically.

Verified Answer :

David1993 David1993

27-01-2017

Hello,

To this question, It's only directly sum the equations:

y + y = 7x - 7x +7+19

2y = 0x + 26

2y = 26

y = 26 ÷ 2

y = 13

Now only to replace y = 13 in the equation of up or of down.

Then stay:

y = 7x + 7

13 = 7x + 7

7x = 13 -7

7x = 6

x = 6 / 7

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