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if 4x+1=12 4x+1-1=12-1 4x=11 4x/4=11/4 x=11/4
4X - 1 = 9 Is an equation. 4X - 1 = 9 4X = 10 X = 5/2 =====
4x-1=2x+1
-3
16x2 + 8x + 1 = 0 : This factorises to (4x + 1)(4x + 1) = 0 When 4x + 1 = 0 then 4x = -1 : x = -1/4.