Question

36-42:e:(15:3-4:1) -20=10 rezolvati va rog prin metoda mersului inapoi​

Answer 1

Răspuns:

36-42:e:(15:3-4:1) -20=10

36-42:e:(15:3-4:1)=10+20

42:e:(15:3-4:1)=36-30

42:e:(5-4)=6

42:e=6·1

e=42:6

e=7

Answer 2

Răspuns: $\red{\underline{~\bf e = 7~}}$

Explicație pas cu pas:

$\bf 36-42:e:(15:3-4:1) -20=10$

$\bf 36-42:e:(5-4)=10+20$

$\bf 36-42:e:1=30~~~\bigg|\cdot1$  

$\bf 36-42:e=30\cdot1$

$\bf 36-42:e=30~~~\bigg|\cdot e$

$\bf 36\cdot e-42=30\cdot e$

$\bf 36\cdot e=30\cdot e+42$

$\bf 36\cdot e-30\cdot e=42$

$\bf 6\cdot e=42~~~\bigg|:6$

$\red{\boxed{~\bf e = 7~}}$

$==pav38==$