Răspuns:
[tex]\bf a)~ - 0,5x= -7,5[/tex]
[tex]\bf x = - 7,5 : ( - 0,5) \implies \red{\underline{x = 15}}[/tex]
_____________________
[tex]\bf b)~ - \dfrac{5}{2} y = \dfrac{1}{4}\implies -5y\cdot 4= 1\cdot 2[/tex]
[tex]\bf - 20y = 2 \implies\blue{\boxed{\bf y = - \dfrac{1}{10}}}[/tex]
_____________________
[tex]\bf c)~1,4z = -\dfrac{7}{2}[/tex]
[tex]\bf 1,4z = - 3,5 \implies \purple{\underline{z = - 2,5}}[/tex]
_____________________
[tex]\bf d)~ \dfrac{6}{5}u = 0,8\implies \bf 1,2u = 0,8[/tex]
[tex]\bf u = 0,8 :1,2\implies \green{\underline{u = 0,666}}[/tex]
_____________________
[tex]\bf e)~9,9: x = - 3 \implies \dfrac{99}{10}:x = - 3[/tex]
[tex]\bf \dfrac{99}{10}\cdot \dfrac{1}{x}=- 3\implies \dfrac{99}{10x}=-3[/tex]
[tex]\bf- 30x=99\implies x=-\dfrac{~99^{(3}~}{30}[/tex]
[tex]\pink{\boxed{\bf x=-\dfrac{33}{10}}}[/tex]
_____________________
[tex]\bf f)~x:\Big(-\dfrac{6}{7}\Big)=\dfrac{13}{6}[/tex]
[tex]\bf -x\cdot \dfrac{7}{6}=\dfrac{13}{6}\implies -7x= 13[/tex]
[tex]\purple{\boxed{\bf x= -\dfrac{13}{7}}}[/tex]
_____________________
[tex]\bf g)~- 1,6x = 0,8 \implies[/tex]
[tex]\bf x=(-1,6):0,8\implies \red{\underline{x = -2}}[/tex]
_____________________
[tex]\bf h)~ y : \dfrac{5}{2} = 3,4 \implies y\cdot\dfrac{2}{5} = 3,4[/tex]
[tex]\bf 2y=3,4 \cdot 5\implies 2y = 17[/tex]
[tex]\blue{\boxed{\bf y = \dfrac{17}{2} }}[/tex]
==pav38==
