3x + 7 = 46 is an equation. It can be solved as follows: 3x = 39 so x = 13
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3x + 7y = 3*x + 7*y = 3*6 + 7*4 = 18 + 28 = 46
4x plus 7 plus 3x equals 19 plus xx = 2
3x + 2y = 7
In the equation 3x plus 7 equals 13, x is equal to 2.
if 3x+7 = 3 then 3x = 3-7 3x = -4 then, x = -4/3