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faltersainse [42]
4 years ago
10

Solve using elimination method -3x + 5y = 8 -2x + 7 y = -2​

Mathematics
1 answer:
Slav-nsk [51]4 years ago
6 0
  • Answer:

<em>x = - 6</em>

<em>y = - 2</em>

  • Step-by-step explanation:

<em>-3x + 5y = 8  | ×(-2)</em>

<em>-2x + 7 y = -2​ | ×3</em>

<em />

<em>6x - 10y = - 16</em>

<em>- 6x + 21y = - 6</em>

<em>add</em>

<em>6x - 6x - 10y + 21y = - 16 - 6</em>

<em>11y = - 22</em>

<em>y = - 22 : 11</em>

<em>y = - 2</em>

<em>replace y</em>

<em>- 2x + 7(-2) = - 2</em>

<em>- 2x - 14 = - 2</em>

<em>- 14 + 2 = 2x</em>

<em>2x = - 12</em>

<em>x = - 12 : 2</em>

<em>x = - 6</em>

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