-14x + 15y = 15

-21x - 20y = -10

Use substitution to find the x and y coordinates.

Question

03-12-2015
Mathematics

Answered

-14x + 15y = 15

-21x - 20y = -10

Use substitution to find the x and y coordinates.

Verified Answer :

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Panoyin Panoyin · Answer 1 · 2015-12-03T19:19:37-05:00

-14x + 15y = 15
      -14x + 14x + 15y = 14x + 15
         15y = 14x + 15
          15    15
         y = ¹⁴/₁₅x + 1
   -21x - 20y = -10
   -21x - 20(¹⁴/₁₅x + 1) = -10
-21x - 20(¹⁴/₁₅x) - 20(1) = -10
       -21x - 18²/₃x - 20 = -10
      -39²/₃x - 20 = -10
      + 20 + 20
      -39²/₃x = 10
       -39²/₃   -39²/₃
   x = ⁻³⁰/₁₁₉
         y = ¹⁴/₁₅x + 1
   y = ¹⁴/₁₅(⁻³⁰/₁₁₉) + 1
   y = ⁻²⁸/₁₁₉ + 1
   y = ⁹¹/₁₁₉
      (x, y) = (⁻³⁰/₁₁₉, ⁹¹/₁₁₉)

-14x + 15y = 15 -21x - 20y = -10Use substitution to find the x and y coordinates.

Verified Answer :

Related Questions

-14x + 15y = 15

-21x - 20y = -10

Use substitution to find the x and y coordinates.