Răspuns :
produsul mezilor = produsul extremilor
7/x = 21/12
21x = 7*12
21x = 84
x = 84/21
x = 4
[tex] \frac{7}{x} = \frac{21}{12} [/tex]
[tex]21 \times x = 7 \times 12[/tex]
[tex]x = \frac{7 \times 12}{21} = \frac{12}{3} = 4[/tex]
produsul mezilor = produsul extremilor
7/x = 21/12
21x = 7*12
21x = 84
x = 84/21
x = 4
[tex] \frac{7}{x} = \frac{21}{12} [/tex]
[tex]21 \times x = 7 \times 12[/tex]
[tex]x = \frac{7 \times 12}{21} = \frac{12}{3} = 4[/tex]