2x - 13x + 42 = x +ax + b
a + b =
2(x - 6.5x + 21) =
34 = a + b
Ax + B = Bx + C Ax - Bx = (C - B) x (A - B) = (C - B) x = (C - B) / (A - B)
x = (d-a)/(a-c)
x = -c/(a+b), provided a+b is not 0
A linear equation ?
Just subtract y from both sides. 'm' becomes 'A', 'b' becomes 'C' and 'B' will be equal to one.
It is a straight line with gradient -A/B and intercept C/B.
Ax + B = Bx + C Ax - Bx = (C - B) x (A - B) = (C - B) x = (C - B) / (A - B)
ax + b = 15 or ax + b = -15
a function
Ax + By = C By = -Ax + C y = (-A/B)x + C/B
A linear equation.
x = -c/(a+b), provided a+b is not 0
x = (d-a)/(a-c)
It is: 3x2+6x-11 = 0
A linear equation ?
[ Ax + By = C ] If 'A', 'B', and 'C' are numbers, then the graph is always a straight line, and the equation is a "linear" one.
The graph of the first form passes through the origin while the second does not - unless c = 0.