x=13
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Substitute 5 for x and solve: 8 + 6(5) = ?
x/-5 + 8 = 11 To solve this: Subtract 8: x/-5 = 3 Multply by -5: x = 3*-5 Work it out: 3*-5 = -15 x = -15
2
you just equal that equation to 0, then you solve for x 5x-8=0 5x=8 x=8/5
x2 - 16x + 68 = 5 (x - 8)2 + 4 = 5 (x - 8)2 = 1 x - 8 = 1 or -1 x = 9 or 7