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1000-(432:4+278×2):4×5+174:7-a=612:9
Va rog repede!!!

Răspuns :

Spidie
1000-(432÷4+278×2)÷4×5+147÷7- a=612÷9
1000-(108+556)÷4×5+147÷7- a=68
1000-664÷4×5+147÷7- a=68
1000-166×5+147÷7- a=68
1000-830+147÷7- a=68
170+21- a=68
191-68= a
a=123

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