Jika 3x +12 = 7x – 8, tentukan x +2

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Jika 3x +12 = 7x – 8, tentukan x +2

3x + 12 =7x – 8
3x – 7x  =-8 – 12
     -4x = – 20
         x= 5

x + 2 = 5 + 2
        = 7

3x + 12 = 7x -8
3x-7x = -8-12
-4x = -20
x = -20/-4
x = 5
dimasukan kedalam x+2 = 5+2 = 7