solve the following systems of equations.?

Question

1)x-y=3 2)2x+4y=10
2x-y=-1 3x-2y=-9

Answer 1

..x - y = 3.................... 4x - 4y = 12
2x + 4y = 10 .................2x + 4y = 10
.................................... 6x = 22..............x = 11 / 3
...................................... y = x - 3 = 11 / 3 - 3 = 2 / 3

..x - y = -1......................-2x + 2y = 2
3x - 2y = -9.....................3x - 2y = -9
..................................... x = -7
..................................... y = x + 1 = -7 + 1 = -6

Answer 2

If there's a quadratic, then there'll maximum in all probability be 2 solutions. first of all, the addition approach might want to artwork completely in this gadget. upload the right sides and the left sides to get. y + 5x + 6x^2 - 13x - y = 3 - 5 be conscious how the 'y's cancel out 6x^2 - 8x = -2 Divide each and each area by technique of two 3x^2 - 4x = -a million 3x^2 - 4x + a million = 0 (3x - a million)(x-a million) = 0 x = a million ; a million/3 Now plug it into the better equation to sparkling up for y y + 5x = 3 y = 3 - 5x y = 3 - 5(a million) y = 3 - 5(a million/3) y = -2 ; 4/3 so the recommendations are ( a million , -2 ) , ( a million/3 , 4/3)

Answer 3

1) X = -4 Y = -7
2) X = -1 Y = 3

Answer 4

1.)
x - y = 3
x = y + 3

2(y + 3) - y = -1
2y + 6 - y = -1
y + 6 = -1
y = -7

x = -7 + 3
x = -4

ANS : (-4,-7)

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2.)
2x + 4y = 10
2x = -4y + 10
x = -2y + 5

3(-2y + 5) - 2y = -9
-6y + 15 - 2y = -9
-8y + 15 = -9
-8y = -24
y = 3

x = -2(3) + 5
x = -6 + 5
x = -1

ANS : (-1,3)

Answer 5

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(1) x-y=3 ------------------------- [ i ]
2x-y=( -1) -------------------- [ ii ]

now ,,, Multiply the [ i ] equation with 2.

then , 2x-2y=6 and 2x-y= (-1)

the solution will be y= (-7) and x=(-4)

(2) 2x+4y=10
3x-2y=(-1)

now ................ multiply the first equation by 3 and the second equation by 2 .

now thw equations will be

6x+12y=30
6x-4y=(-18)


on solving the solutions will be

y = 3 and x=(-3)

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Answer 6

Spend a bit more time reading your book and working the examples they give so you understand them. That's how you get good at math.


(another nasty, mean, ol' math prof )
Doug

Answer 7

x-y=3
2x-y=-1
-----------
- + +
------------
=> -x =4
=> x= -4
=> -4-y=3
=> -4+3=y
=> -1=y

Answer 8

Could do it in my sleep... by doing my own HW in the past.

Are we solving for x or y? Use theorems...

Answer 9

um no im not doing your homework are you stupid ???? those are soooooo easy