va rog ajutați-mă 15 20 pct​

a)

x + 12 = 25

x = 25 - 12

x = 13

b)

x + 1,3 = 2,45

x = 2,45 - 1,3

x = 1,15

c)

[tex]x + \frac{1}{4} = \frac{4}{3} [/tex]

[tex]x = \frac{4}{3} - \frac{1}{4} = \frac{4 \times 4 - 3}{3 \times 4} = \frac{16 - 3}{12} = \frac{13}{12} [/tex]

a) x+12=25 b)x+1,3=2,45

x=25-12 x=2,45-1,3

x=13 x=1,15

[tex]x + \frac{1}{4} = \frac{4}{3} \\ x = \frac{4}{3} - \frac{1}{4} \\ amplifici \ cu \ 4 \ prima \ si \ cu \ 3 \ la \ a \ doua \\ x = \frac{16}{12} - \frac{3}{12} \\ x = \frac{13}{12} [/tex]

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