Question

Determinați x din proporția :
a) x/5=12/15
b) x+2/x-5 =12/5
Dau coroană, urgent!!

Answer 1

$a) \frac{x}{5} = \frac{12}{15}$

$\frac{x}{5} = \frac{4}{5}$

$x = \frac{4 \times 5}{5}$

$x = 4$

$b) \frac{x + 2}{x - 5} = \frac{12}{5}$

$5(x + 2) = 12(x - 5)$

$5x + 10 = 12x - 60$

$12x - 5x = 10 + 60$

$7x = 70$

$x = \frac{70}{7}$

$x = 10$

Answer 2

a)x/4
b)x=10/37
Sucesee!!!