Question

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26×15+400:100+y:5 - 85=408. (Notează "y:5,, cu A.)
30×28:6+y×3-40:10=190​

Answer 1

Răspuns:

Explicație pas cu pas:

26×15+400:100+y:5 - 85=408

y: 5 = a =>

26×15+400:100+a -85 = 408 =>

390 + 4 + a -85 = 408 =>

394 +a = 408+85 =>

394+a = 493 =>

a = 493-394

a = 99

y:5 = 99 => y = 99·5 => y = 495

30×28:6+y×3-40:10=190​   ; y×3 = b =>

840:6 + b -4 = 190 =>

140 + b -4 = 190 =>

140+b = 190+4 =>

b = 194-140 => b = 54 =>

y×3 =54 => y = 54:3 => y = 18

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