Answer Key Reteaching with Practice 1. 2x 3 7x Given Subtraction prop. of equality 3 5x 3 Division prop. of equality 5 x 2.
4 23x 5 11 x Given 4 6x 10 11 x Distributive prop. 6x 14 11 x Simplify. 6x 3 x Subtr. prop. of equal. Add. prop. of equal. 7x 3 3 Div. prop. of equality x 7 3. 6x 2 4x 1 Given
6x 2 4x 4 Distr. prop. 6x 4x 6 Add. prop. of equal. Add. prop. of equal. 10x 6 3 Div. prop. of equal. x5 1 3 4. 5x 4 2x 5 Given 1 17 5 x 5 2x Subtr. prop. of equal. 17 9 Subtr. prop. of equal. 5 5x 17 Mult. prop. of equal. 9 x 5.
Given MN PQ MP MN NP Segment Addition Postulate MP PQ NP Substitution prop. of equality NQ PQ NP Segment Addition Postulate Substitution prop. of equality MP NQ 6.
AB DE Given AD AB BD Segment Addition Postulate AD DE BD Substitution prop. of equality BE DE BD Segment Addition Postulate AD BE Substitution prop. of equality
7.
Given mAQB mCQD mAQC mAQB mBQC Angle Addition Postulate mAQC mCQD mBQC Substitution prop. of equality mBQD mCQD mBQC Angle Addition Postulate mAQC mBQD Substitution prop. of equality 8.
mRPS mTPV Given mTPV mSPT Given mRPS mSPT Transitive prop. of equality mRPV mRPS mSPT mTPV Angle Addtion Postulate mRPV mRPS mRPS mRPS Substitution prop. of equality mRPV 3mRPS Distributive property
