3x + 4 = 12
Subtract 4 from both sides: 3x = 8
Divide both sides by 3: x = 8/3 = 22/3
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3x+8 = 12 3x = 4 x = 4/3
6x+4=3x+12 => 6x-3x=12-4 => 3x=8 => x=8/3=2.666...
12 + 3x = 412 - 12 + 3x = 4 - 123x = -83x/3 = -8/3x = -8/3x = -(2 2/3)
x = 12
3x + 2= 3 (times) 4= 12 12+4= 16 The answer is 16.