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Earn +20 ptsQ: What is this equal 5x 2y 19 x - 2y -1?
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5x plus 2y equals 19 x - 2y equals -1?
(3, 2)
Simplify 5m plus 7-2m-1?
5m + 7 - 2m - 1 = 3m + 6
Did you hear about math worksheet page 167?
3x-5y=7 5x-2y=-1
What is the solution to 2y equals 5x - 1 x equals y plus 2?
If those are two different equations, such that 2y=5x-1 and x=y+2, then you subsitute y+2 in for x in the first equation, and when you solve the whole thing, you get that x=-1 and y=-3, or the point (-1,-3)
What is the ordered pair for 2x plus 5y equals 16 plus -5x minus 2y equals 2?
2x + 5y = 16 + (-5x) - 2y = 2 That gives 2x + 5y = 2 . . . . . . . . . . (I) and -5x - 2y = - 14 or 5x + 2y = 14 . . . . (II) (I)*5: 10x + 25y = 10 (II)*2: 10x + 4y = 28 Subtracting the second from the first, 21y = -18 so y = -18/21 = -6/7 and then by (I) x = 1 - 5y/2 = 1 - 5/2*(-6/7) = 1 + 15/7 = 22/7 So the ordered pair is (22/7, -6/7)
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