Question

qual o valor universo na equação 7 ( x + 1 ) -2 ( x - 5 ) = x - 5, U=z

Answer 1

Resposta:

7 ( x + 1 ) -2 ( x - 5 ) = x - 5

7x+7-2x+10=x-5

5x+17=x-5

5x-x=-17-5

4x=-22

x=-11/2