Answer :
To solve the system of equations using the substitution method, the first step involves manipulating the equations to isolate one variable. Starting with the given system of equations:
[tex]\[ \begin{cases} x + 2y = 10 \\ 7x - 5y = 12 \end{cases} \][/tex]
The first step is to solve one of these equations for one variable.
Let’s solve the first equation for [tex]\(x\)[/tex]:
1. Begin with the first equation:
[tex]\[ x + 2y = 10 \][/tex]
2. Rearrange the equation to isolate [tex]\(x\)[/tex]:
[tex]\[ x = 10 - 2y \][/tex]
Now you have expressed [tex]\(x\)[/tex] in terms of [tex]\(y\)[/tex]. This is the required first step in the substitution method.
So, the correct answer is:
Solve one of the equations for one variable.
[tex]\[ \begin{cases} x + 2y = 10 \\ 7x - 5y = 12 \end{cases} \][/tex]
The first step is to solve one of these equations for one variable.
Let’s solve the first equation for [tex]\(x\)[/tex]:
1. Begin with the first equation:
[tex]\[ x + 2y = 10 \][/tex]
2. Rearrange the equation to isolate [tex]\(x\)[/tex]:
[tex]\[ x = 10 - 2y \][/tex]
Now you have expressed [tex]\(x\)[/tex] in terms of [tex]\(y\)[/tex]. This is the required first step in the substitution method.
So, the correct answer is:
Solve one of the equations for one variable.