Grade 10s substitution method

Solving by substitution was today’s theme.  We worked through increasingly complex substitutions to calculate the intersection point of two lines. Some of us checked answers with desmos to be sure we got them right.  Others are noticing hat substituting x and y values back into the equation is also a way to verify a solution.  We have set our test date for next Friday.  Start studying chapter 1 grade 10s!