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a fost răspuns

Aflati x din: a)xpe15=7pe3;b)2x+5pe3x-7=11 pe 2​

Răspuns :

Răspuns:

Explicație pas cu pas:

x/15 = 7/3

x = 15*7/3 = 35

_____________

(2x+ 5)/(3x - 7) = 11/2

2(2x + 5) = 11(3x - 7)

4x + 10 = 33x - 77

33x - 4x = 77 + 10

29x = 87

x = 87 : 29 = 3

[tex]\frac{x}{15}=\frac{7}{3}=>3x=105=>x=105:3=>x=35\\\\\frac{2x+5}{3x-7}=\frac{11}{2}=>4x+10=33x-77=>33x-4x=77+10=>29x=87=>x=3[tex][/tex][/tex]