Solve the system of equations:?

Question

{2x + 4y = -1}
{3x + y = 1}

Answer 1

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

from eqe (2) y=1-3x
put the value of y in (1)
2x+4(1-3x)=-1
2x+4-12x=-1
-10x=-5
x=1/2

y=1-3x
y=1-3/2
y=-1/2

Answer 2

There are 3 ways to slove but the easy way for me is to take one equation and make it = x or y
3x + y =1
-3x -3x
y = -3x + 1
and plug it in with the other one
2x + 4y = -1
2x + 4 ( -3x + 1) = -1
2x + -12x + 4 = -1
-10x + 4 = -1
-4 -4
-10x = -5
-10x/-10 = -5/-10
x=1/2
and go back to one of the original equations and put 1/2 in place of x.

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Answer 3

Solve for y in equation 2 then plug the answer into the first equation.

Answer 4

2x+4y=-1---------------(1)
3x+y=1------------------(2)
multiplying (2) with 4,we get
12x+4y=4----------------(3)
subtracting (1) from (3),we get
10x=5
or x=1/2,putting the value in (2),we get
3.1/2+y=1
or y=1-3/2=-1/2,so x=1/2 & y=-1/2 ans

Answer 5

- 6x - 12y = 3
6x + 2y = 2--------ADD
- 10 y = 5
y = - 1/2

3x - 1/2 = 1
3x = 3 / 2
x = 1 / 2

x = 1 / 2 , y = - 1 / 2

Answer 6

most easiest method to solve system of equations is by matrics method bcz we can find the value of variable not only from simple equation but also from the equation which is in complex form.
but substitution method can use only for system of linear eqations.

Answer 7

x= 0.5
y= -0.5

Answer 8

0.5 and -0.5