Question

a) x + y = 42
x − y = 8

b) −2x + y = −12
2x + 3y = 36

c) x + y = 28
2x − y = 17

d) 2x + 7y = 1
−2x + 3y = −11

e) 8x + 6y = 10
−3x + 6y = −12

f) 4x + 2y = −7
−2x − 3y = 0, 5

Answer 1

Resposta:

f){4x +2y = - 7 4x +2y= - 7

{ {-2x -3y =0,5(2) - 4x -6y = 1

-_______________________

-4y= -6

y = -6/-4= +3/2

×=-1 S{ -1, +3/2} resolucao foto

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