Question

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

Answer 1

$8x-5x-3=6$

$3x-3=6$

$3x=6+3$

$3x=9$

$x=9:3$

$x=3$

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$8\cdot3-5\cdot3-3=6$ (это проверка)

$24-15-3=6$

$6=6$

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$2+6a+4a=92$

$2+10a=92$

$10a=92-2$

$10a=90$

$a=90:10$

$a=9$

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$2+6\cdot9+4\cdot9=92$

$2+54+36=92$

$92=92$

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$2x-15+8x=5$

$10x-15=5$

$10x=5+15$

$10x=20$

$x=20:10$

$x=2$

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$2\cdot2-15+8\cdot2=5$

$4-15+16=5$

$5=5$

Answer 2

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