Solve a system of linear equations using substitution

What is the first step in solving a system of equations using substitution?

• Isolate one of the variables

• Multiply both equations by a constant

• Add the equations together

• Graph the equations

Which variable is typically chosen to isolate in the substitution method?

• The variable with the largest coefficient

• The variable with a coefficient of 1 or -1

• The variable that appears in both equations

• The variable that is a fraction

After substituting y = 2x - 1 into the second equation, what is the resulting equation?

• 8x + 4(2x - 1) = 6

• 4x + 2y = 3

• 8x + 4y = 6

• 2x - y = 1

What is the value of x after solving the substituted equation?

• 2/3

• 5/8

• 3/4

• 1/2

What is the final value of y after substituting x = 5/8 back into the equation?

• 2/5

• 3/8

• 1/4

• 1/2