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2. Repasa la resolución de sistemas por el método ... - Amolasmates

2. Repasa la resolución de sistemas por el método ... - Amolasmates

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UNIDAD 6 Sistemas <strong>de</strong> ecuaciones<br />

c) ° 3x + 8y = 1<br />

¢<br />

£<br />

5x – 2y = –6<br />

<strong>2.</strong> <strong>Repasa</strong> <strong>la</strong> <strong>resolución</strong> <strong>de</strong> <strong>sistemas</strong><br />

<strong>por</strong> <strong>el</strong> <strong>método</strong> <strong>de</strong> sustitución<br />

➀ 3x + 8y = 1 8 3x = 1 – y 8 x =<br />

– 8y<br />

➁ 5x – 2y = –6 8 5 · – 2y =<br />

3<br />

➂ 5 · – 2y = –6 8 5 · (1 – 8y ) = · ( –6 + y)<br />

1 – 8y<br />

8 y =<br />

3<br />

1 – 8<br />

1 – 8y<br />

➃ x =<br />

3<br />

8 x =<br />

3<br />

8 x =<br />

➄ x = , y =<br />

1 – y<br />

Pág. 2 <strong>de</strong> 2

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