Answer
Does not make sense
Work Step by Step
When one of the equations has a variable on one side by itself, it’s easy to make substitution of it in other equation. Therefore, substitution method is easier than addition method.
For example:
Consider a system of equation,
\[\begin{align}
& x+y=6 \\
& y=2x
\end{align}\]
Here, in second equation variable y is in terms of variable x. So, it is easier to use substitution method rather than addition method.
So, substitute \[y=2x\]in the first equation and solve x:
\[\begin{align}
& x+y=6 \\
& x+2x=6 \\
& 3x=6 \\
& x=2
\end{align}\]
Now put the value of x obtained above, in \[y=2x\]:
\[\begin{align}
& y=2x \\
& y=2\cdot 2 \\
& y=4
\end{align}\]
Hence, \[\left( 2,4 \right)\]is a solution of this system of equation.
To solve this system of equation, one can use addition method also, but the substitution method is easier.
When one of the equations has a variable on one side by itself, substitution method is easier than addition method. Hence, the provided statement does not make sense.
