Question

abc=270 ab=30 bc=90 atunci a+b+c=​

Answer 1

Explicație:

$a \times b \times c = 270 \\ a \times b = 30 \\ b \times c = 90 \\ \\ \\ a \times b \times c = 270 \\ 30 + \times \: c = 270 \\ c = 270 \div 30 \\ c = 9 \\ \\ a \times b \times c = 270 \\ a \times 90 = 270 \\ a = 270 \div 90 \\ a = 3 \\ \\ a \times b \times c = 270 \\ 9 \times 3 \times b = 270 \\ 27 \times b = 270 \\ b = 270 \div 27 \\ b = 10 \\ \\ a + b + c = \\ 10 + 3 + 9 = 22$

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