Question

x+3=2x-7 com calculo

Answer 1

x + 3 = 2x - 7
x - 2x = -7 - 3
   - x = -10
     x = 10

Answer 2

x + 3 = 2x - 7

x -2x = -7 - 3

-x=-10   * (-1)

x = 10