3x+5=14
3x+5-5=14-5, -5 on both side
3x=9
(3x)/3=9/3, dividing by 3 on both side, so x=3
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If: 3x+7 = -14 Then: x = -7
It is a quadratic equation in the variable x.
3x+50=6x+14 50-14=6x-3x 36=3x x=36 / 3 therefore x=12
x = 4
It is a linear equation in one variable, x.