Răspuns:
Explicație pas cu pas:
3)
2/3*7+9/5*4= ⁵⁾14/3+³⁾36/5=(70+108)/15=178/15
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4)
= (3*5+2)/5*(2*4+1)
=17/5*9/4= 153/20
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5)
x+ (2*15+8)/ 15 * 3/2=(5*4+2)/4
x +38/15*3/2=22⁽²/4
¹⁰⁾x +²⁾19/5=⁵⁾11/2
10x+38=55
10x= 55-38
10x= 17
x= 17/10
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b)
109/50:y/1= 109 /1.000
109/50*⁵⁰⁾1/y=109/1000
109/50y=109/1000
109*50y=109*1.000
5450y= 109.000
y= 109.000 : 5450
y= 20
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6)
54¹⁷/₂₀=1097/20= 54,85 m ( are balotul)
1¹/₅=6/5
6/5*15= 18m ( pentru pantaloni )
2¹/₁₀=(2*10+1)/10=23/10
23/10* 8= 18,4 m ( costume )
18+18,4= 36,4 ( în total )
54,85-36,4=18,45 m ( au ramas )
