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20-04-2020
Mathematics

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8) Solve the following system by the substitution method. Check the solution(s).

6x + 7y = 3
x + y = 1

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nabaohan nabaohan

20-04-2020

Answer:

x= 4

y= -3

Step-by-step explanation:

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20-04-2020

(-1) 6x + 7y = 3
(6) x + y = 1

-6x - 7y = -3
6x + 6y = 6

-1y = -3

divide both by -1

y = 3

then

6x + 7(3) = 3
6x + 21 = 3
6x = -18

divide both by 6

which equals x = -3

Answer Link

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