In today’s class, students reviewed linear expression/equations and studies a few examples of word problems to understand the key points and general strategy in solving the word problems in math. In the two-variable linear equations, students learned the idea of equations of solving multi-variable linear equations, and studied the first method to solve the two-variable linear system, called “substitution”. The key using substitution method is to solve one of the equation in order to represent one variable in terms of another variable, then to substitute the same variable in another equation.

Here are practice questions

P.92, 3.3.2, 3.3.4, 3.3.5, 3.3.6

P.126, 5.1.1

P.130, 5.2.1 (a), (d), 5.2.4