Question

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Answer 1

Respuesta:

$55 una vaca

Explicación paso a paso:

$4x+7y=514 \\ </p><p>8x+9y=818$

$( 8)4x+7y=514 \\ </p><p>( - 4)8x+9y=818$

$32x + 56y = 4112 \\ - 32x - 36y = - 3272$

_________________________

$20y = 840 \\ y = \frac{840}{20} \\ y = 42$

$4x + 7(42) = 514 \\ 4x + 294 = 514 \\ 4x = 514 - 294 \\ 4x = 220$

$4x = 220 \\ x = \frac{220}{4 } \\ x = 55$

comprobación

4(55)+7(42)=514

220+294=514

8(55)+9(42)=818

440+378=818