Question

Tìm x biết

a) 14x + 27x + 13x = 3888

b) 1084 + ( 942 - 2x ) : 36 .14 = 1434

Giúp mk với các bn.Mk k cho 

Answer 1

b) 1084+(942-2x):16.14=1434

=>(942-2x):36.14=1434-1084

=>(942-2x):36.14=350

=>(942-2x):36=350:14

=>(942-2x):36=25

=>942-2x=25.36

=>942-2x=900

=>2x=942-900

=>2x=42

=>x=42:2

=>x=21

Answer 2

a) 14x+27x+13x=3888

=>(14+27+13)x=3888

=>54x=3888

=>x=3888:54

=>x=72

Answer 3

a)14x+27x+13x=3888

=(14+27+13)x=3888

=54x=3888

x=3888:54

x=72

b)1084+(942-2x):36.14=1434

=(942-2x):36.14=1434-1084

=(942-2x):36.14=350

=(942-2x):36=350:14

=(942-2x):36=25

=942-2x=25.36

=942-2x=900

=2x=942-900

=2x=42

x=42:2

x=21

Answer 4

1084+(942-2x):36.14=1434

          (942-2x):36.14= 1434-1084

          (942-2x):36.14= 350

          (942-2x):36= 350:14

          (942-2x):36= 25

           (942-2x)= 25.36

             (942-2x)= 900

                    2x = 942-900

                     2x = 42

                     x = 42:2= 21

k cho minh nha