Question

10x{10:[10-(10-a x2)]}+10=60​

Answer 1

10 × { 10 : [ 10 - ( 10 - a × 2 ) ] } + 10 = 60

10 × { 10 : [ 10 - ( 10 - a × 2 ) ] } = 60 - 10

10 × { 10 : [ 10 - ( 10 - a × 2 ) ] } = 50

10 : [ 10 - ( 10 - a × 2 ) ] = 50 : 10

10 : [ 10 - ( 10 - a × 2 ) ] = 5

10 - ( 10 - a × 2 ) = 10 : 5

10 - ( 10 - a × 2 ) = 2

10 - a × 2 = 10 - 2

10 - a × 2 = 8

a × 2 = 10 - 8

a × 2 = 2

a = 2 : 2

a = 1

Answer 2

Răspuns:

Explicație pas cu pas:

10 x { 10 : [ 10 - ( 10 - a x 2 ) ] } + 10 = 60​

10 x { 10 : [ 10 - ( 10 - a x 2 ) ] }  = 60 - 10

10 : [ 10 - ( 10 - a x 2 )] = 50 : 10

10 : [ 10 - ( 10 - a x 2 )] = 5

10 - ( 10 - a x 2 ) = 10 : 5

10 - ( 10 - a x 2 ) = 2

10 - a x 2 = 10 - 2

10 - a x 2 = 8

a x 2 = 10 - 8

a x 2 = 2

a = 2 : 2

a = 1 → numarul, aflat prin metoda mersului invers