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2x[45+2x(400-298)]-488

Răspuns :

2x[45+2x(400-298)]-488=2x[45+2x102)-488=
2x(45+204)-488=
2x249-488=
498-488=
10
2x [45+2x( 400-298)]-488=
2x[45+2x102]-488=
2x[45+204]-488=
2x 249-488=
498-488=
10