Question

Este egal cu 51


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Answer 1

Răspuns:

3×{10+2×[40-2×(28-3×5)]}-7x=51

=3×{10+2×[40-2×(28-15)]}-7x=51

=3×[10+2×(40-2×13)]-7x=51

=3×[10+2×(40-26)]-7x=51

=3×(10+2×14)-7x=51

=3×(10+28)-7x=51

=3×38-7x=51

=114-7x=51

=7x=114-51

=7x=63

=x=63:7

x=9