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

Which system would you most likely use substitution to solve?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

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

Which system is most easily solved by substitution?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6