edolieyu2 edolieyu2

19-06-2017
Mathematics

contestada

0.5(x−12)+0.2(x+7)=0.3x+3.4
x=

12x(x+2)−5(2x−1)
x=

3 1/8 ÷(x−4 7/28 )= 17/18 +1 5/6
x=

please answer this in less then 20 minutes!

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Аноним Аноним

20-06-2017

I only know number one and three.
1. x=20
3. x= 4.95

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