Răspuns: [tex]\green{\underline{~\bf x=9~}}[/tex]
Explicație pas cu pas:
[tex]\bf \{120-2\cdot[14+5\cdot(x-3)]\}:4=8~~~\bigg|\cdot4[/tex]
[tex]\bf 120-2\cdot[14+5\cdot(x-3)]=32[/tex]
[tex]\bf 120= 32 + 2\cdot[14+5\cdot(x-3)][/tex]
[tex]\bf 120-32 = 2\cdot[14+5\cdot(x-3)][/tex]
[tex]\bf 88 = 2\cdot[14+5\cdot(x-3)]~~~\bigg|:2[/tex]
[tex]\bf 14+5\cdot(x-3) = 44[/tex]
[tex]\bf 14+5\cdot(x-3) = 44-14[/tex]
[tex]\bf 5\cdot(x-3) = 30~~~\bigg|:5[/tex]
[tex]\bf x-3 = 6[/tex]
[tex]\bf x = 6+3[/tex]
[tex]\green{\underline{~\bf x=9~}}[/tex]
[tex]==pav38==[/tex]
