Question

Este oare numarul 1 pe 2 solutia ecuatiei:
7,2:x=3.6?

Rezolvati in multimea Q ecuatia si efectuati verificarea:
a)0.47x-0.14x=1.65
b)(4x-1):3= - 1 pe 3

Answer 1

a)0. 61x=1.65
x=1.65:0.61
x=1.0065


b) (4x-1):3=-1/3
4x-1:3=-1/3
4x-1/3=-1/3
4x=1/3+(-1/3)
4x=1/3-1/3
4x=-2/3
x=2/3:4
x=2/3×1/4
x=1/12


7,2:x=3.6
7.2x•2\1=3. 6

Answer 2

$7,2:x=3,6\Leftrightarrow \dfrac{7,2}{x}=3,6|_{\cdot10} \Leftrightarrow \dfrac{72}{x}=36|_{:36}\Leftrightarrow \dfrac{2}{x}=1 \Leftrightarrow x=2.$