Summary for solving a system of equations by substitution

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Mathematics
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11th Grade - University
•
Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in solving a system of equations by substitution?
Solve for any variable
Eliminate one variable
Identify a variable with a coefficient of 1 or -1
Graph the equations
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When using substitution, what should you do if both variables have a coefficient of 1?
Choose the variable you like better
Use elimination instead
Ignore the coefficients
Solve for both variables simultaneously
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a common mistake students make when substituting values back into equations?
Not simplifying the equation
Using the wrong equation
Solving for the wrong variable
Forgetting to solve for the second variable
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How should you handle an expression like X = 2Y + 1 during substitution?
Ignore the expression
Solve for Y first
Plug in 2Y + 1 for X
Plug in 2 for X
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What should you remember when writing solutions for systems of equations?
Write the solution as a single number
Only write the solution for Y
Only write the solution for X
Write solutions for both variables
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