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Afla numarul necunoscut: a+ 26×35=2407; b-31×148=1032; 89×105-c=25×14; d-48×16=123×20

Răspuns :

a+26×35=2407
a+910=2407
a=2407-910
a=1497


b-31×148=1032
b-4588=1032
b=1032+4588
b=5620


89×105-c=25×14
9345-c=350
c=9345-350
c=8995


d-48×16=123×20
d-768=2460
d=2460+768
d=3228

Sper ca te-am ajutat!!!!! Coronita?