Question

Resolva o sistema a seguir
a+b+c=9, b-2c=2, 4c=8

Answer 1

4c = 8
C = 2
2c = 4
b -2c = 2
b = 2c + 2
B = 4 + 2 = 6
a + 6 + 2 = 9
a + 8 = 9
a = 1

a = 1
B = 6
C = 2

Bons estudos ♡

Answer 2

BNHAcademia ✌

{a + b + c = 9

{b - 2c = 2

{4c = 8

I)

4c = 8

c = 8/4 = 2

II)

b - 2c = 2

b - 2.2 = 2

b - 4 = 2

b = 2 + 4 = 6

III)

a + b + c = 9

a + 6 + 2 = 9

a + 8 = 9

a = 9 - 8

a = 1

S = (a,b,c) = (1 , 6 , 2)

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