Question

Determinati a si b daca a/7=b/3 si a-b=48​

Answer 1

Răspuns:

Explicație pas cu pas:

$\dfrac{a}{7} = \dfrac{b}{3} = \dfrac{a-b}{7-3} = \dfrac{48}{4} = 12$

$\dfrac{a}{7} = 12 \iff a = 7 \cdot 12 \implies a = 84\\\dfrac{b}{3} = 12 \iff b = 3 \cdot 12 \implies b = 36$

Answer 2

Răspuns:

$\frac{a}{7} =\frac{b}{3} = > a=\frac{7b}{3} \\\\a-b=48\\\\\frac{7b}{3} -b=48= > 7b-3b=144= > b=144:4= > b=36\\\\a=48+36= > a=84$