5X + 9
5(3) + 9
15 + 9
= 24
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5x plus 3 does equal 3 plus 5x; commutative law.
5x+3 = 3x+11 5x-3x = 11-3 2x = 8 x = 4
-4x + 3 = -5x + 3add 5x to each sidex + 3 = 3subtract three from each sidex = 0
3 + 5x = 38 -> 5x = 35 -> x = 7
0. 6x + 3 = 5x + 141. 6x = 5x + 11 [subtracting 3]2. x = 11 [subtracting 5x]