#1: (25·a) − (12·a) + (8·b) − (11·a) − (19·b) + (13·c) − (5·c) − (2·a) + (28·b)
#1: (17·b) + (8·c)
#1: 0 = (2·x^2) − (3·x) − 20
Equation is a degree 2 polynomial equation in (x).
Equation was solved with the quadratic formula.
(3 − (13·sign))
#1: x = –––––––––––––––
4
There are 2 solutions.
Solution number 1 with sign = 1:
x = -2.5 = -5/2
Solution number 2 with sign = -1:
x = 4