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exercitiu 324*27-40:5+(a*7-12)=8784 urgent va rog

Răspuns :

324*27=8748

40/5=8

deci 8748-8+a*7-12=8784

8740+a*7-12=8784

a*7+8740-12=8784

a*7+8728=8784

a*7=8784-8728

a*7=56, deci a=8