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Professor
Blake
Beau(8x^2-14x-30)/(2x-6)=(4x^2-x-15)/(x-3)=(4x+5)(x-3)/9x-3) =(4x+5)
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What is the x value of 12x - 5y equals 30 y equals 2x - 6?
Substitute 2x - 6 for y in first equation: 12x - 5(2x - 6) = 30 ie 12x - 10x + 30 = 30 so 2x = 0 making x = 0 and y = -6
What is the ordered pair of 14x - 2y equals 78 2x - 2y equals 6?
You can answer this by the method of substitution, which means that you find what one variable equals and you substitute it into the second equation to find the other variable.14x-2y=78; solve for y-2y=78-14x; subtract 14x on both sidesy=-39+7x; divide both sides by -2y=7x-39Substitute 7x-39 for y in the second equation.2x-2(7x-39)=6; solve for x2x-14x+78=6; distribute the -2-12x+78=6-12x=-72; subtract 78 on both sidesx=6; divide both sides by -12Now go back to the first equation and for x, substitute 6. You can either substitute in 14x-2y=78 or the y=7x-39, but it's easier where you already have y isolated.y=7(6)-39y=42-39y=3You got that x=6 and that y=3; therefore, the ordered pair is (6,3).
2x - 6 4?
2x-6=4 6+4=2x 10=2x 10/2=x 5=x x=5
What is 2X plus 4 equals 10?
2x + 4 = 10 2x = 10 - 4 = 6 2x = 6 x = 6/2 = 3
What is the answer to '2x plus 6'?
2x + 6 = what? There is not enough information to solve for x.
