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Earn +20 ptsQ: If x equals 4 and y equals 1 then 7x plus 8y equals?
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4x plus y equals 9 7x - 8y equals 6?
(2, 1)
What is the answer to 4x plus y equals 9 and 7x-8y equals 6?
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
What is -8y - 7 equals -8 plus 8y?
If: -8y-7 = -8+8y Then: -7+8 = 8y+8y And: 16y = 1 So: y = 1/16
-6y plus 2 equals 8y plus 16?
y = -1
What is 8x plus 7 equals 7x plus 8?
x=1
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