How to solve a system using substitution

What is the main purpose of using substitution in solving equations?

• To eliminate all variables

• To find the value of one variable

• To make the equation more complex

• To change the equation entirely

Why is it important to have the same variable in the equation when using substitution?

• To find the value of that variable

• To avoid solving the equation

• To make the equation longer

• To confuse the solver

What is the result of combining like terms in the equation 3(-4Y) + 2Y = 20?

• 12Y = 20

• -12Y = 20

• 10Y = 20

• -10Y = 20

After finding Y = -2, what is the next step to find the value of X?

• Divide both sides by 2

• Multiply both sides by 2

• Add 2 to both sides

• Substitute Y into the original equation for X

What is the coordinate point solution for the system of equations given in the tutorial?

• (-8, -2)

• (8, -2)

• (-8, 2)

• (8, 2)