Question

resolva os sistema de equacoes polinomios do 1 grau
a) ( x-y =16
( X+Y=74

B) ( 2x -y= 20
( 2x + y= 48

Answer 1

a) x-y= 16
x+y= 74

2x= 90
x= 90/2
x= 45

45+y= 74
y= 74-45
y= 29

x=45
y= 29


b) 2x-y= 20
2x+y= 48

4x= 68
x= 68/4
x= 17

2.(17)+y= 48
34+y= 48
y= 48-34
y= 14

x= 17,
y= 14


Espero ter ajudado!

Answer 2

a) x-y= 16
x+y= 74

2x= 90
x= 90/2
x= 45

45+y= 74
y= 74-45
y= 29

x=45
y= 29


b) 2x-y= 20
2x+y= 48

4x= 68
x= 68/4
x= 17

2.(17)+y= 48
34+y= 48
y= 48-34
y= 14

x= 17, 
y= 14