Mom I have a math test on Monday. It is about Method of Substitution. I don't understand it and I don't wanna fail? I text my friends to see if they could help but they also don't understand it.
Hey Jessica. Are you ok? You seem very sad?
Ok. I will go try that. Thank you Mom.
Don't be sad. Why don't you go search on google some method of substitution videos and take down notes. See if you understand?
Csúszik: 2
Hello everyone welcome back to my channel. Today my video is going to be about method of substitution. Today we will be going over the meaning of substitution and we will go over example as well.- Definition of substitution: solving a linear system by substituting one variable from one equation into the other equation. Q's: y = -x + 8 x - y = 4 Step 1:The equation 1 is y = -x + 8 so you can substitute -x + 8 in equation 2 for y.x - y = 4x - (-x + 8) = 4x + x - 8 = 42x - 8 = 4 2x = 4 + 8 2x = 12x = 6
Step 2: Substitute x 6 in equation 1 to find the corresponding value for y.y = -x + 8y = - (6) + 8 y = 2Thank you guys so much for watching I hope you guys understood everything and enjoyed todays video. BYE!
Csúszik: 3
I finally understood the method of substitution. I am so happy!
Yes Jessica.
MOM! MOM! MOM!
OMG! I am so proud of you. I knew you could do it.
Thanks Mom for your help!
Of course
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