Răspuns:
Explicație pas cu pas:
a)
(x+2⁸/₁₅)*3/2= 5¹/₄
2⁸/₁₅= (2*15+8)/15=38/15
5¹/₄=(5*4+1)/4=21/4
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(x+38/15)*3/2=21/4
x+38/15=21/4*2/3
se simplifica 3 cu 21 si 4 cu 2
x+38/15=7/2
x= ¹⁵⁾7/2-²⁾38/15
x= 105/30-76/30
x=29/30
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b)
(109/50)/y= 109/1.000
y=(109/50): 109/1.000
y= (109/50) * 1.000/109
y= se simplifica 109 cu 109
y= 1000/50
y=20