Subtract 1 from both sides
3x = 511 - 1
Simplify 511 - 1 to 510
3x = 510
Divide both sides by 3
x = 510/3
Simplify 510/3 to 170
x = 170
➷ 3x + 1 = 511
Subtract 1 from both sides:
Divide both sides by 3:
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