Răspuns: [tex]\red{\underline{~\bf e = 7~}}[/tex]
Explicație pas cu pas:
[tex]\bf 36-42:e:(15:3-4:1) -20=10[/tex]
[tex]\bf 36-42:e:(5-4)=10+20[/tex]
[tex]\bf 36-42:e:1=30~~~\bigg|\cdot1[/tex]
[tex]\bf 36-42:e=30\cdot1[/tex]
[tex]\bf 36-42:e=30~~~\bigg|\cdot e[/tex]
[tex]\bf 36\cdot e-42=30\cdot e[/tex]
[tex]\bf 36\cdot e=30\cdot e+42[/tex]
[tex]\bf 36\cdot e-30\cdot e=42[/tex]
[tex]\bf 6\cdot e=42~~~\bigg|:6[/tex]
[tex]\red{\boxed{~\bf e = 7~}}[/tex]
[tex]==pav38==[/tex]
