Question

b) Aflați numărul b din egalitatea
4 - {3 + 77:[3x (b+5) - 7]}:10 = 3



urgeeeeent


va rog pas cu pas



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Answer 1

4 - { 3 + 77 : [ 3 × ( b + 5 ) - 7 ] } : 10 = 3

{ 3 + 77 : [ 3 × ( b + 5 ) - 7 ] } : 10 = 4 - 3

{ 3 + 77 : [ 3 × ( b + 5 ) - 7 ] } : 10 = 1

3 + 77 : [ 3 × ( b + 5 ) - 7 ] = 1 × 10

3 + 77 : [ 3 × ( b + 5 ) - 7 ] = 10

77 : [ 3 × ( b + 5 ) - 7 ] = 10 - 3

77 : [ 3 × ( b + 5 ) - 7 ] = 7

3 × ( b + 5 ) - 7 = 77 : 7

3 × ( b + 5 ) - 7 = 11

3 × ( b + 5 ) = 11 + 7

3 × ( b + 5 ) = 18

b + 5 = 18 : 3

b + 5 = 6

b = 6 - 5

b = 1