Odpowiedzi

2013-07-06T10:32:16+02:00

\\-\frac32x-6=\frac97x+\frac89 \\-\frac32x-\frac97x=6+\frac89 \ /*9*7*2 \\-189x-162x=756+112 \\-351x=868 \\x=-\frac{868}{351} \\x=-2\frac{166}{351}

 

Obliczenia z wykorzystaniem rozdzielnosci mnozenia wzgledem dodawania:

3*9*7=21*9=21*10-21=210-21=200-11=189

9*9*2=81*2=80*2+1*2=160+2=162

6*9*7*2=63*12=630+63*2=630+60*2+3*2=630+120+6=756

8*7*2=56*2=50*2+6*2=100+12=112

2*351=2*300+2*50+2*1=600+100+2=702

868-702=168-2=166

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2013-07-06T10:55:46+02:00

-1,5x - 6 = 1²/₇ x + ⁸/₉

-3/2 x - 9/2 x = 8/9 + 6 

-21/14 x - 18/14 = 62/9

-39/14 x = 62/9  I*14*9

-351x = 868  /:(-351)

x = -868/351 

x = -2 i 166/351

 

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