2x=24 9-2x=27 4x+7=51 2x-4=2(x-2)

2x=24  // x=12 9-2x=27 // -2x=18 // x=-9  4x+7=51  / 4x=44 // x=11  2x-4=2(x-2) // 2x-4=2x-4 / 0=0

2x = 24 | ÷ 2 x = 12 9 - 2x = 27 -2x = 27-9 -2x = 18 | ÷ (-2) x = -9 4x + 7 = 51 4x = 51 - 7 4x = 44 | ÷4 x = 11 2x - 4 = 2(x - 2) 2x - 4 = 2x - 4 0 = 0 Brak rozwiązania