September 2018 0 20 Report

BŁAGAM POMÓRZCIE BO JA TEGO NIE ROZUMIEM A JUTRO MAM KARTKÓWKĘ. ROZWIĄŻCIE MI TO RÓWNANIE.
f) {2x+9y= -9
{-3+3y=8

od Agniszka123
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Agniszka123
lampardsix
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lampardsix

2x + 9y = -9

-3 + 3y = 8

 

2x + 9y = -9

3y = 8 + 3

 

2x + 9y = -9

3y = 11

 

2x + 9y = -9

y = 11 : 3

 

2x + 9y = -9

y = \frac{11}{3}

 

2x + 9 * \frac{11}{3} = -9

y = 3\frac{2}{3}

 

2x + 33 = -9

y = 3\frac{2}{3}

 

2x = -9 - 33

y = 3\frac{2}{3}

 

2x = -42

y = 3\frac{2}{3}

 

x = -21

y = 3\frac{2}{3}

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