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(749:7+10×40+324:3)-(345+812:2-921:3)+a=500​

Răspuns :

ElenaAdelina06ask

Raspuns:

a=500-171

a=329

Explicatie:

(749:7+10×40+324:3)-(345+812:2-921:3)+a=500

(107+400+108)-(345+406-307)+a=500

(507+108)-(751-307)+a=500

615-444+a=500

171+a=500

a=500-171

a=329

Proba:

171+329=500

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