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Q: If x equals 4 and y equals 1 then 7x plus 8y equals?

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(2, 1)

4x + y = 9 so that y = 9 - 4x 7x - 8y = 6 7x - 8*(9-4x) = 6 7x - 72 + 32x = 6 39x = 78 x = 2 Then y = 9 - 4x = 9-4*2 = 9-8 = 1

If: -8y-7 = -8+8y Then: -7+8 = 8y+8y And: 16y = 1 So: y = 1/16

x=1

The answer to the math problem -3 7x plus 7 is x equals 1/3.

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(2, 1)

4x + y = 9 so that y = 9 - 4x 7x - 8y = 6 7x - 8*(9-4x) = 6 7x - 72 + 32x = 6 39x = 78 x = 2 Then y = 9 - 4x = 9-4*2 = 9-8 = 1

If: -8y-7 = -8+8y Then: -7+8 = 8y+8y And: 16y = 1 So: y = 1/16

-1

y = -1

x=1

The answer to the math problem -3 7x plus 7 is x equals 1/3.

(1, -1)

12y + 2 or 2*(6y+ 1)

3+3x+7x=13 3x+7x=10 10x=10 x=1

7x + 1 = 20 7x = 19 x = 19/7 x = 2.714285 recurring (that is, 2.714285714285..)

The value of x is 1

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