Question

Resolva com contas montadas as equações a seguir em IR: A)2×+7=15. B)7×-3=25.C)4a+8=12??

Answer 1

a)2X= 15-7             b) 7x= 25-3       c) 4a= 12-8                                             
   2x= 8                       7x=22                 4a=4
   x= 8÷2                    x=22÷7                 a=4÷4
   x= 4                        x=3.142...             a= 1