Substitution VS Elimination System of Equations

[@brianmclogan]

Most obvious way to trick my students with system of equations-
ruclips.net/video/XUVyI5RM9HI/видео.html

[@m.edited]

Why did you multiply the top equation by 3 on the first step for elimination

[@Xandoooy]

So the 2 Y's can cancel out.

[@zenabgul2659]

But u didnt multiply 7 with 3 in 1st equation

[@sheenaelmer9519]

Thanks this helped my daughter so much!!💓