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Matematyka wokół nas 1

2a+2(a+b)=2a+2a+2b=4a+2b[m]

P=2x⋅120%x​=2x⋅1,2x​=0,6x2[cm2]

acm &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;- pierwsza podstawa (a−40%a)cm=0,6acm

ahkm​ &nbsp;-&nbsp;prędkość pierwszego autobusu (a+b%a)hkm​

x &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Adam x - 3&nbsp; &nbsp; &nbsp;&nbsp; Ania x - 5 &nbsp; &nbsp; &nbsp; Beata x + 30 &nbsp; &nbsp;Tata x + 28 &nbsp; &nbsp;Mama [(x+30)+(x+28)]−[x+(x−3)+(x−5)]=

A. 2(x−21​)=2x−41​→

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