How do solve the following linear system?: #-7x + y = -19 , -2x + 3y = -19 #?
For a linear system with 2 different unknowns, we use
Substitution Equation to find the actual value of the unknown.
There are two unknowns,
From one of the equation, for example Equation 1 we can rearrange a new equation and substitute it into the other equation.
Let say, from Equation 1,
Rearrange the equation in terms of only one unknown.
Substitute Equation 3 into Equation 2 and we will get;