(-1,-2)
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∙ 2010-04-15 15:35:062x + 3y = 17 3x + 4y = 24 (2x + 3x) + (3y + 4y) = (17 + 24) 5x + 7y = 41
2x + 4y - 5x + 3y = 7y - 3x
Since 2x-3y=4y=8 we can say that 4y=8 therefor y=2 We can also say that 2x-3y=4y and as y=2 2x-6=8 so 2x=14 and x =7 so y=2 and x=7
y=2
1) 2x + 4y = -62) x -3y = 7We can add 3y to both sides of equation 2) to getx = 3y + 7Now we can substitute 3y + 7 for x in equation 1).In other words, we replace any 'x'es in equation 1) with 3y + 7.2x is two times x, so this becomes 2(3y + 7) which is two times 3y_and_sevenEquation 1) becomes2(3y + 7) + 4y = -6or6y + 14 + 4y = -6or10y + 14 = -6Subtracting 14 from both sides,10y = -20Dividing both sides by 10,y = -2.Substituting -2 for y in equation 1),2x - 8 = -6Add 8 to both sides2x = 2x = 1Check our results with equation 2x - 3y = 71 + 6 = 7
2x + 3y = 17 3x + 4y = 24 (2x + 3x) + (3y + 4y) = (17 + 24) 5x + 7y = 41
10x - 3y + 2x - 4y =(10x + 2x) + (-3y - 4y) =12x - 7y
2x + 4y - 5x + 3y = 7y - 3x
6x plus 4y
10x+2x-3y-4y=12x-7y
If: 2x-3y = -15 and x = 4y Then: x = -12 and y = -3
The ordered pair is (-1, -2).
It is the same as: 6x+4y
4x + 3y - 2x - 7y2x - 4y
Since 2x-3y=4y=8 we can say that 4y=8 therefor y=2 We can also say that 2x-3y=4y and as y=2 2x-6=8 so 2x=14 and x =7 so y=2 and x=7
3x + 7y
4y + 4 = 3y - 5 y = -9