4x - 1 = 15
Therefore, 4x = 16
x = 16/4
Therefore, x = 4
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4x=3x+1 => (4x-3x)=1 => x=1 therefore the value of x is 1.
4x2 - x - 5 = 0 4x2 + 4x - 5x - 5 = 0 4x(x + 1) - 5(x + 1) = 0 (4x - 5)(x + 1) = 0 4x - 5 = 0 or x + 1 = 0 4x = 5 or x = -1 x = 5/4 o x = -1
16x³ - x = 0 By factorization, we obtain: x(16x² - 1) = 0 x(4x - 1)(4x + 1) = 0 Set each term by 0 and solve for x to get: x = 0 and 4x - 1 = 0 and 4x + 1 = 0 x = {0, ±¼}
If 4x + 7 = 3... then x must equal -1
2x + 2 = 4x -1 2x = 3 x = 1.5