Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Algebra 1 Section 7.3 Solve linear systems by linear combinations
Document related concepts
Transcript
Algebra 1 Section 7.3 Solve linear systems by linear combinations Solve a–b=8 a + b = 20 Solve 3x – 2y = 1 2x + 2y = 4 Solve by linear combinations x – y = -5 x + 2y = 4 To solve by linear combinations 1. Make the coefficients on one of the variable terms opposites 2. Add the equations to eliminate one variable term 3. Solve the equation 4. Substitute and solve for the other variable solve 2a + 6b = 4 3a – 7b = 6 10x + 16y = 140 5x – 8y = 60 solve x + 1 – 3y = 0 2x = 7 – 3y Page 413 ex 4 x = gold volume y = silver volume Gold + silver volume volume = total volume Gold . Gold + Silver . Silver = Weight Density Volume Density Volume assignment Page 414 Problems 8 – 42 even,43,44,58
