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1. -6x + 8y = 36

2. 7x + 6y = 4

6y = 4 - 7x

y = (4-7x)/6 Put this in the first equation and solve

-6x + 8((4-7x)/6) = 36

-36x + 8(4-7x) = 216 Multiply with 6 to simplify.

-36x + 32 - 56x = 216

-36x -56x = 216 - 32

-92x = 184

x = 184/-92

x = -2

X = - 2

Now that you have X, put it in any of the equations above to solve Y.

7x + 6y = 4 Put in x = -2

7(-2) + 6y = 4

-14 + 6y = 4

6y = 4 + 14

y = 18/6

y = 3

Y = 3

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Q: Use linear combinations to solve the system.. negative 6x plus 8y equals 36 and 7x plus 6y equals 4 Find X and Y?
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