6x2+13x-5 = 0 (2x+5)(3x-1) = 0 x = -5/2 or x = 1/3
3x + 10x - 48 = 0 13x = 48 x = 3.692307692
Add the coefficients of the variable term X. 2 + 3 + 8 = 13X
13(x + 50) = 30 13x + 650 = 30 subtract 650 to both sides; 13x = -620 divide by 13 to both sides; x = -620/13
6x2+13x-5 = (2x+5)(3x-1) when factored
13x
it equals 13X.
-13x = 52 x = -4 Check: -13*-4 = 52
x + 13x + 10x = 50 - 6
x = -1.
7 + 13x = -9 ie 13x = -9 - 7 x = -16/13 or "Minus one and three thirteenths"
13x
It is a straight line equation
That equation represents only one line. y - 11 = 13x - 7 y = 13x + 4 The slope is 13.
x2 + 13x = -30 ∴ x2 + 13x + 30 = 0 ∴ (x + 3)(x + 10) = 0 ∴ x ∈ {-3, -10}
42 + x2 = 13x ∴ x2 - 13x + 42 = 0 ∴ (x - 6)(x - 7) = 0 ∴ x ∈ {6, 7}
That equation represents only one line. y - 11 = -13x - 7 y = -13x + 4 The slope is -13.