Question

a) – 2x + y = 4

b) y + 3x = 3

c) 2y – x = 4​

Answer 1

Explicação passo-a-passo:

a)

– 2x + y = 4

y=4+2x

y=2x + 4

2x + 4 =0

2x = -4

x= -4 ÷ 2

x= -2

S={-2)

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b)

y + 3x = 3

y = -3x + 3

-3x + 3 =0

-3x =-3

x= -3 ÷ -3

x=1

S={ 1}

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c) 2y – x = 4​

2y=x+4

y=(x+4)÷2

(x+4)/2=0

x+4=0

x=-4

S={4}