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a)5•{4•[3•(2•+1)+1]+1}-44=876​

Răspuns :

3(2x+1)+1=6x+3+1=6x+5

4(6x+5)+1=24×+20+1=24×+21

5(24x+21)-44=876

120x+105-44=876

120x+61=876

120=876-81

120x=815

x=815/120 (simplificăm prin 5)

x=163/24

COROANA??

Răspuns:

5•{4•[3•(2•+1)+1]+1}-44=156

Explicație pas cu pas:

5*[4*(3*3+1)]-44=

=5*(4*10)-44

=5*40-44

=200-44

=156