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vladimir1956 [14]
3 years ago
9

Substituition method 5x-3y+1=16 2x+5y=-6

Mathematics
1 answer:
laila [671]3 years ago
3 0
5x - 3y + 1 = 16 ⇒ 10x -    6y + 2 = 16
2x + 5y + 0 = -6 ⇒ <u>10x + 25y + 0 = -6</u>
                                         31y + 2 = 10
                                         <u>         -2    -2</u>
                                               <u>31y</u> = <u>8</u>
                                                31    31
                                                   y = 8/31
                            5x - 3(8/31) + 1 = 16
                              5x - 24/31 + 1 = 16
                                     5x + 7/31 = 16
                                    <u>        -7/31    -7/31</u>
                                                 <u>5x</u> = <u>10 24/31</u>
                                                  5           5
                                                   x = 2 24/155
                                             (x, y) = (2 24/155, 8/31)
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