1/9 + 1/b = c 1/b = c - 1/9
1 = cb - b/9
9 = 9cb - b
9 + b = 9cb
(9 + b)/9c = b *parenthesis here means its all over 9c.
4
s = -2 -4r
There are 2 unknowns
Solving by the elimination method: x = 7 and y = 2
the first step in solving the equation is to subtract the nine from the three. you will get negative 6.
Solving for d: d = -4.7 satisfies the equation.
you need 2 equations to solve for 2 variables
Solving tne simultaneous equation gives x = 19.8 and y = -2.2
Solving by elimination: p = 3 and q = -2
Solving these simultaneous equations by the elimination method:- x = 1/8 and y = 23/12
1 and 3/4
Solving for y: 5y = 9 + 2y 5y - 2y = 9 3y = 9 y = 9/3 = 3