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20 + 3y = y + 21 – 15

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20 + 3y = y + 21 – 15

Guest 04.12.2014

Beste Antwort

+14538

+5

20 + 3y = y +21 - 15

20 + 3y = y + 6

3y - y = 6 - 20

2y = - 14

y = - 7

Probe: 20+3*(-7) = -7+6 => 20-21 = -1 => -1 = -1

Gruß radix !

radix 04.12.2014

1⁺⁰ Answers

+14538

+5

Beste Antwort

20 + 3y = y +21 - 15

20 + 3y = y + 6

3y - y = 6 - 20

2y = - 14

y = - 7

Probe: 20+3*(-7) = -7+6 => 20-21 = -1 => -1 = -1

Gruß radix !

radix 04.12.2014

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