Question

PRECISO URGENTE DESSA RESPOSTAS; Equação linear

a )
x + y = 32 e 50 x + 10 y = 980

b) 10 X + 5 Y = 32 e X + Y = 980

Answer 1

Boa tarde

a)

x + y = 32,
50x + 10y =  980 

x + y = 32
5x + y = 98
4x = 66
x = 33/2

33/2 + y = 64/2
y = 64/2 - 33/2
y = 31/2 

S = (33/2, 31/2)

b)

10x + 5y = 32,
x + y = 980

10x + 5y = 32
5x + 5y = 4900

10x - 5x = 32 - 4900
5x = -4868
x = -4868/5

 -4868/5 + y = 4900/5
y = (4900 + 4868)/5
y = 9768/5
S = (-4868/5, 9768/5)