"2 over 3x equals 4" is an equation in a single variable, x.
2/(3x) = 4 => 3x/2 = 1/4 => 3x = 2/4 = 1/2 => x = 1/6.
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3x + 2 = -10 3x = -12 x = -4
3x - 2 = 2x + 4 3x - 2x = 4 + 2 x = 6
x = 2
X = -2(13 + y) / 3x = 5y / 4 - 1
4=3x-14 18=3x I carried the 14 over and it became positive. x=6 I divided 18 by 3.