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Earn +20 ptsQ: What is x plus y plus 6x plus 7y?
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What is -7y plus x?
x = 7y x/7 = y
What is the slope of the line 6x-7y10?
if: 6x - 7y = 10 then -7y = 10 - 6x y = 6x/7 - 10/7 The slope is now the coefficient of x, which is 6/7.
How do you factor x2-y2 plus 7x plus 7y?
(x - y + 7)(x + y)
What is x when y equals x plus 1 divided by x-7?
-6
If 4x-5y equals 4 and 6x-7y equals 10 what is the value of x?
4x - 5y = 4 & 6x - 7y = 10 This is a pair of simultaneous equations. Re-write as 4x - 5y = 4 6x - 7y = 10 To find the value of 'x; we need to eliminate 'y' To do this multiply the top eq'n by '-7' and the bottom equation by '5' . This brings the coefficients of 'y' to the same value, but one is plus(+) and the other is negative(-). Hence -28x + 35y = -28 30x - 35y = 50 Add the two eq'ns, this will eliminate 'y' 2x = 22 x = 11
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