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Calculati; 29×56+a=6000 a+29×56=5142 800:4+3000-3×2×(9000-8979

Răspuns :

29x56+a=6000
1624+a=6000
a=6000-1624=4376
a+29x56=5142
a+1624=5142
a=5142-1624=3518
800:4+3000-3x3x(9000-8979)=200+3000-6x21=
3200-126=3074