3X + 6 + X = 86
add the like terms, X's, together
4X + 6 = 86
subtract 6 from each side
4X = 80
divide both sides by 4
X = 20
check
3(20) +6 + (20) = 86
86 = 86
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it equals 3.
35
5x plus 3 does equal 3 plus 5x; commutative law.
6x plus 3 equals 8x plus 14 when solved mathematically is equal to x = -5.5.
144