Question

(10x + 7y = 4(x - 1) + 8
8x + 7y = 10
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Answer 1

Respuesta:

x = -3/7

y = 94/49

Explicación paso a paso:

• Hallamos "x"

10x+7y = 4(x-1)+8 ↓ –

8x+7y = 10

_______________

18x = 4(x-1)+8-10

18x = 4x-4-2

14x = -6

x = -6/14

x = -3/7

• Reemplazamos para hallar "y"

8(x) + 7(y) = 10

8(-3/7) + 7y = 10

-24/7 + 7y = 10

7y = 10 + 24/7

7y = 94/7

y = 94/7(1/7)

y = 94/49