Ирешить уравнения: 8*x-5*x-3=6 2+6*a+4*a=92 2*x-15+8*x=5 решить

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(это проверка)

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8*x-5*x-3=6                  2+6a+4a=92                        2x-15+8x=5

3x=6+3                          10a=92-2                          2x+8x=5+15

3x=9                               10a=90                              10x=20

x=3                               a=9                                       x=2