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Earn +20 ptsQ: What is x and y if 6x plus 4y equals 54?
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6x plus 4y equals 32 -6x plus 4y equals 8?
6x = 32 - 4y and 4y - 8 = 6x so 32 - 4y = 4y - 8 ie 40 = 8y so y = 5 and x = 2
How do you solve 6x-4y equals 54 -9x plus 2y equals -69 using substitution?
-9x + 2y = -69 So 2y = 9x - 69 The other equation can be written as 6x - 4y = 54 or 6x - 2*2y = 54 Substituting for 2y gives 6x - 2*(9x - 69) = 54 6x - 18x + 138 = 54 12x = 84 x = 7 and then 2y = 9x - 69 = 9*7 - 69 = 63-69 = -6 so that y = -3
How much is (2x plus 3y) plus (4x plus y)?
It is the same as: 6x+4y
What is 10x plus 3y minus 4x minus 7y equals?
6x - 4y
Describes the graph of the equations 2y equals 3x plus 2 and 4y equals 6x plus 1?
The lines are parallel.
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