2x - 13x + 42 = x +ax + b
a + b =
2(x - 6.5x + 21) =
34 = a + b
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Ax + B = Bx + C Ax - Bx = (C - B) x (A - B) = (C - B) x = (C - B) / (A - B)
x = -c/(a+b), provided a+b is not 0
x = (d-a)/(a-c)
A linear equation ?
Just subtract y from both sides. 'm' becomes 'A', 'b' becomes 'C' and 'B' will be equal to one.