Question

a:(7x9-9x6)=10+10
Afla numarul necunoscut

Answer 1

Salut,

$a \div (7 \times 9 - 9 \times 6) = 10 + 10 \\ a \div (63 - 54) = 20 \\ a \div 9 = 20 \\ a = 20 \times 9 \\ a = 180$

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