He did that to eliminate variables and be left with one variable. when d an e was eliminated, b was solved. The technique is similar to that used in a simultaneous equation. If you add the two equations for the unitary b you would get 2b=6d+2e+2 (sum of equations 1 and 2) -6b=-6d-2e-12 (equation 3 times -2) -4b= 0+ 0 -10 -4b=-10 b=-10/-4 = 2.5 or 5\2 Remember your integers - divided by negative returns a positive! This seemed complicated but the strategy was to get a linear equation through elimination, solve for b and solve for the other variables by substitution.
Hi there! Thank you for the question. b=10/4 is the same as b=5/2. You can use either one. Make sure that your coefficients are whole numbers at the end.
hey i did not understand why u multiplied 3b=6+3d+e with -2
It is to eliminate e
@@gadisamohammed9513 but why use -2? can any number be used in it's place to eliminate e?
He did that to eliminate variables and be left with one variable. when d an e was eliminated, b was solved. The technique is similar to that used in a simultaneous equation. If you add the two equations for the unitary b you would get
2b=6d+2e+2 (sum of equations 1 and 2)
-6b=-6d-2e-12 (equation 3 times -2)
-4b= 0+ 0 -10
-4b=-10 b=-10/-4 = 2.5 or 5\2
Remember your integers - divided by negative returns a positive!
This seemed complicated but the strategy was to get a linear equation through elimination, solve for b and solve for the other variables by substitution.
@@MarciaArleneDebra ty.. I was not aware of the concept of simultaneous equations at that time.. thx for taking ur time to explain it to me
You are nice teaching 👍👍🙏
Thank you! I appreciate the feedback!
Hi I love this method .....but don't understand why did you multiply by negative 2
How you get -2
Well take time....how long the equation.. Bell is ringing...
amazing broooo..💓
I don't understand , is so complex
How
Good video
For the equation Mg + P4 -----> Mg3P2, why must c=1? a=1 gives a wrong answer.
If a=1 gives a wrong answer you can say a=2
why have you used -2?
To create an equation that could be used to eliminate two of the variables.
It was given by alakh sir physics wallah 6 yrs ago
How
you have done wrong in taking the b value. instead of writing -10/4 you write 10/4
negative divided by negative equals to positive value. He's right.
its -10/-4 so that is 10/4
He is correct
Thats true
How are you doing 41,327,050
I am from India
Why the value of b=10/4. ,not 5/2 .? Whats the difference from philippines .
Hi there! Thank you for the question. b=10/4 is the same as b=5/2. You can use either one. Make sure that your coefficients are whole numbers at the end.
He did not reduce it to the lowest terms, they are equivalent fractions.
Thanks for teaching
But it was to complex😑😑... But it's ok I will be understand
I will also be understand 😂
Lalo akong nahilo
Pinataas mo lalo
😂😂