Question

Tìm x biết: 315+(146-x)=472

                 5x-8=612

                 132:x=23-12

Answer 1

315 + (146 - x)  = 472

          146 - x    =  472 - 315

           146 - x    =  157

                    x    =  146 - 157

                    x        =  -11

5x - 8 = 612

5x        = 612 + 8

5x        =  620

  x        = 620 : 5

  x       =   124

132 : x  = 23 - 12

132 : x   =  11

         x = 132 : 11

         x      =  12

Answer 2

* \(315+\left(146-x\right)=472\)

\(-x=472-315-146\)

\(-x=11\Rightarrow x=-11\)

* \(5x-8=612\)

\(5x=612+8\)

\(5x=620\)

\(x=620:5=124\)

* \(132:x=23-12\)

\(132:x=11\)

\(x=132:11=12\)

(Nhớ k cho mình với nhá!)

Answer 3

a) 315+(146-x)=472

                     146-x=472-315

                     146-x=157

                            x=146-157

                            x=-11

Vậy x=-11

b)5x-8=612

           5x=612+8

           5x=620

             x=620:5

             x=124

Vây x=124

c)132:x=23-12

          132:x=11

                x=132:11

                x=12

Vậy=12