2x - 2y = 12
29. - 3y = -2

Olá boa tarde meu nome é "Guilherme" sou de Brasil e vou resolver a sua pergunta

a ) 2x - 2y = 12

{ a 2

{ b 2

{ c 12

/\ = b elevado 2 -4 a.c

/\ = (2) elevado 2 -4 . 24

/\ = 4 -4 . 24

/\ = 24

X = -b+/ /\ = 2 - 5

2a 2

5

2

5

2

S = {20,10}

b) 29. - 3y = -2

{ a = 29

{ b = -3

{ c = -2

/\ = b elevado 2 -4 a.c

/\ = (-6) -4 . 58

/\ = -10 . 58

/\ = -48

X = b + / /\ = -3 + 24

5

3

5

3

S = { 15,15}

Espero ter ajudado

2a 2

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98

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step-by-step explanation: