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[(80•x-20•11)÷5+84÷4]÷7=175
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Jojoi54ask

Răspuns:

[(80•x-20•11)÷5+84÷4]÷7=175

[(80x x-220):5+21]=175x7

(80xx-220):5+21=1225

(80x x-220):5=1225-21

(80x x-220):5=1204

(80x x-220)=1204x5

80x x-220=6020

80x x=6020+220

80x x=6240

x=6240:80

x=78

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