Age 11Sample11-year-old · 6th grade
Where two paths meet
From The Geometry of Linear Equations · Gilbert Strang
Two rules at once are two paths. The solution is where they meet — if they meet.
Original lecture on MIT OpenCourseWareBefore this sitting
Can you already do this?
Two quick checks on “you will be able to…”. Right on both and this sitting becomes mixed practice, not a lecture. Wrong is useful — we keep the full sitting.
One linear equation in two unknowns is…
x + y = 3 and x + y = 10, together, have…