13x = -156 so x = -12
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x=10
10
10
x2 + 6x - 110 = 0 ∴ x2 + 6x = 110 ∴ x2 + 6x + 36 = 146 ∴ (x + 6)2 = 146 ∴ x + 6 = ±1461/2 ∴ x = -6 ±1461/2 ∴ x ≈ 6.083, 18.083
5x+15 = 6x-10 5x-6x = -10-15 -x = -25 x = 25