Explicație pas cu pas:
a/x = 11 => a=11x
b/y=11 => b =11y
c=11z
d=11t
21-(11(x+y+z+t))/(x+y+z+t))=21-11=10
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Explicație pas cu pas:
a/x = 11 => a=11x
b/y=11 => b =11y
c=11z
d=11t
21-(11(x+y+z+t))/(x+y+z+t))=21-11=10