Given system of the linear equations: 2x1 + x2 = 1 x2 - x3 = 2 -2x1 + x2 + x3 = -2 solve system of linear equations to find x, y, z a) find lu factorization of the coefficient matrix a b) let y = ux. solve the lower triangular system ly = b c) solve the ux = y

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8