Question

(9 x 9 - m - 8 x 4): 7 = 2 x 2;​

Answer 1

Salut!

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Cerință: (9 x 9 - m - 8 x 4): 7 = 2 x 2;

(81-m-32):7=4

49-m=4*7

49-m=28

m=49-28

m=21

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Verificare:

(9*9-21-8*4):7=4

(81-21-32):7=4

(60-32):7=4

28:7=4

4=4 (adevărat)

Answer 2

Răspuns:

Explicație pas cu pas:

(9x9-m-8x4):7=2x2

(81-m-32):7=4

(49-m):7=4

49-m=28

m=49-28

m=21

proba:

(81-21-32):7=28:7=4