Question

ayuda raza porfa

c)y=3x
5x - 2y = 1

e) y = x+4
3x + = 16

g)x= y - 5
3x + 2y=3

i) 4x + 3y = 31
y = 2x + 7

k)x + 2y = 2
5x - 3y = -29
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Answer 1

Verified answer

Respuesta:

c)y=3x

5x - 2y = 1

Se sustituye Y

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

-x=1

-x(-1)=1(-1)

x=-1

y=3(-1)=-3

e) y = x+4

3x + y= 16

3x+(x+4)=16

3x+x+4=16

4x+4=16

4x=16-4

4x=12

x=12/4=3

y=(3)+4=7

g)x= y - 5

3x + 2y=3

3(y-5)+2y=3

3y-15+2y=3

5y=18

y=18/5=3.6

x=3.6-5

x=-1.4

i) 4x + 3y = 31

y = 2x + 7

4x+3(2x+7)=31

4x+6x+21=31

10x=31-21

x=10/10=1

y=2(1)+7=9

k)x + 2y = 2

5x - 3y = -29

x=2-2y

5(2-2y)-3y=-29

10-10y-3y=-29

10-13y=-29

-13y=-29-10=-39

y=-39/-13=3

x=2-2(3)=2-6=-4