Question

Vreau ajutorrrrrrrrr

Answer 1

Răspuns:

x = 9

Explicație pas cu pas:

3·{10+2·[40-2·(28-3·5)]}-7x = 51 <=>

3·{10+2·[40-2·(28-15)]}-7x = 51 <=>

3·{10+2·[40-2·13]}-7x = 51 <=>

3·{10+2·[40-26]}-7x = 51 <=>

3·{10+2·14}-7x = 51 <=>

3·{10+28}-7x = 51 <=>

3·38-7x = 51 =>

114 - 51 = 7x =>

63 = 7x =>

x = 63:7 =>

x = 9