yan65 yan65
  • 01-11-2019
  • Mathematics
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13x-11 +18x15+ 4x+1=180°

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nguyenminhnguyet82
nguyenminhnguyet82 nguyenminhnguyet82
  • 01-11-2019

Answer:

x = - 80/17, or x = - 4 [tex]\frac{12}{17}[/tex]

Step-by-step explanation:

13x-11 +18×15+ 4x+1=180°

<=> (13x + 4x) + (18×15+ 1 - 11)=180°

<=> 17x + 260 =180

<=> 17x = 180 - 260

<=> 17x = - 80

<=> x = - 80/17

<=> x = - 4 [tex]\frac{12}{17}[/tex]

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