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Alex777 [14]
3 years ago
11

Solve the system of equations by substitution y=-2x+18 and 4y-x+9=0

Mathematics
1 answer:
Stells [14]3 years ago
3 0
  • Answer:

<em>x = 9</em>

<em>y = 0</em>

  • Step-by-step explanation:

<em>y = -2x + 18 </em>

<em>4y - x + 9 = 0</em>

<em />

<em>4(-2x + 18) - x + 9 = 0</em>

<em>- 8x + 72 - x + 9 = 0</em>

<em>- 9x + 81 = 0</em>

<em>81 = 9x</em>

<em>x = 81 : 9</em>

<em>x = 9</em>

<em />

<em>y = - 2×9 + 18</em>

<em>y = - 18 + 18</em>

<em>y = 0</em>

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