Solving Systems of Equations by Substitution and Elimination

Which method involves solving one equation for one variable and substituting it into the other equation?

• Elimination

• Substitution

• Graphing

• Factoring

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which system would you most likely use substitution to solve?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Tags

CCSS.HSA.REI.C.9

If you're using the substitution method, what is the first step?

• Solve one equation for one variable

• Substitute the resulting equation for the second variable

• Adjust the coefficients

• Eliminate one variable

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

• Multiply the 1st equation by 4 and the 2nd by 3 to align the y-coefficients

• Multiply the 1st equation by 5 and the 2nd by 2 to align the x-coefficients

• Multiply both equations by 3 to align the y-coefficients

• Add the two equations directly without any adjustments

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which system is best solved using elimination?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

After eliminating a variable, how do you find the second variable?

• Add both equations

• Multiply both equations

• Divide both equations by the same number to isolate the second variable

• Substitute the value of the 1st variable into one of the original equations

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Tags

CCSS.HSA.REI.C.9

Which system is most easily solved by substitution?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6