Question

solve this pls i have to do my hw
I would make brainliest for sure

Answer 1

heya...!!!

---(1)

x + y = 5--------(1)
2x - 3y = 4------(2)

from ---(1) & ---(2)
multiply by (3) in ---(1)

we get,

3x + 3y = 15
2x - 3y = 4
-------------------
5x = 19

=> x = 19/5 put in --(1)

we get,

x + y = 5

= 19/5 + y = 5

= (19 + 5y) = 25

= 5y = 25 - 19

= y = 6/5

-------(2)

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

2x - 2y = 2

= x - y = 1 ---------(2)

from-----(1) & ----(2)
multiply by (3) in ---(2)

we get,

3x + 4y = 10
3x - 3y = 3
(-)__(+)___(-)
------------------
7y = 13

= y = 13/7 put in ---(2)

we get,

x - 13/7 = 1

= (7x - 13) = 7

= 7x = 7 + 13

= x = 20/7 , y = 13/7

--------(3)

3x - 5y = 4----------(1)
9x - 2y = 7-----------(2)

from----(1) & -----(2)
multiply by (3) in --(1)

we get

9x - 15y = 12
9x - 2y = 7
(-)___(+)__(-)
-------------------
-13y = 5

= y = -5/13 put in ---(1)

we get,

3x - 5(-5/13) = 4

(39x + 25) = 52

39x = 52 - 25

x = 27

x = 27/39

x = 9/13

--------(5)

x/2 + 2y/3 = -1

(3x + 4y)/6 = -1

3x + 4y = -6---------(1)

x - y/3 = 3

(3x - y)/3 = 3

3x - y = 9---------(2)

from----(1) & -----(2)

3x + 4y = -6
3x - y = 9
(-)__(+)__(-)
------------------
5y = -15

y = -3 put in --(1)

we get,

3x + 4(-3) = -6

3x = -6 + 12

x = 6/3

x = 2

I HOPE ITS HELP YOU

Answer 2

HELLO DEAR,


1)

x + y = 5--------(1)

2x - 3y = 4------(2)

from ---(1) & ---(2)
multiply by (3) in ---(1)

3x + 3y = 15
2x - 3y = 4
===========
5x = 19

=> x = 19/5 put in --(1)

x + y = 5

=> 19/5 + y = 5

=> (19 + 5y) = 25

=> 5y = 25 - 19

=> y = 6/5

2)

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

2x - 2y = 2

=> x - y = 1 ---------(2)

from-----(1) & ----(2)
multiply by (3) in ---(2)

we get,

3x + 4y = 10
3x - 3y = 3
(-)__(+)___(-)
=============
7y = 13

= y = 13/7 put in ---(2)

x - 13/7 = 1

= (7x - 13) = 7

= 7x = 7 + 13

= x = 20/7 , y = 13/7

3)

3x - 5y = 4----------(1)
9x - 2y = 7-----------(2)

from----(1) & -----(2)
multiply by (3) in --(1)

9x - 15y = 12
9x - 2y = 7
(-)___(+)__(-)
============
-13y = 5

= y = -5/13 put in ---(1)

3x - 5(-5/13) = 4

(39x + 25) = 52

39x = 52 - 25

x = 27

x = 27/39

x = 9/13

5)

x/2 + 2y/3 = -1

(3x + 4y)/6 = -1

3x + 4y = -6---------(1)

x - y/3 = 3

(3x - y)/3 = 3

3x - y = 9---------(2)

from----(1) & -----(2)

3x + 4y = -6
3x - y = 9
(-)__(+)__(-)
===========
5y = -15

y = -3 put in --(1)

3x + 4(-3) = -6

3x = -6 + 12

x = 6/3

x = 2

I HOPE ITS HELP YOU DEAR,
THANKS