Select the correct solutions of the following equations: 1. 2x + 1 = 2(x - 3) + 7 x = 7 x = 0 all real numbers are solutions equation has no real solutions 2. x + 1 = x + 2 x = 1 x = 2 all real numbers are solutions equation has no real solutions 3. 2(x^{2} + 3) = 3(x^{2} + 2) x = 2 x = 0 all real numbers are solutions equation has no real solutions 4. 3(x^{2} - 1) = 0 x = 1 and x = -1 x = 3 and x = -3 all real numbers are solutions equation has no real solutions 5. 3x^{2} = -2 + 2x^{2} x = -2 x = 0 all real numbers are solutions equation has no real solutions 6. x + x + x = 3x + 1 x = 1 x = -3 all real numbers are solutions equation has no real solutions 7. 3 - x = 6 + x - (2x + 3) x = -1 x = 2 all real numbers are solutions equation has no real solutions Press the Submit button to see the results.