in order to make the coefficients easier to work with, first multiply each term of the equation or divide each term of the equation by a number selected by inspection. Then proceed with the solution of the system by an appropriate algebraic method.
40s-30t=60
20s-40t=-50

i got for t=120 and for s 91.5 did i do this right?

Question

in order to make the coefficients easier to work with, first multiply each term of the equation or divide each term of the equation by a number selected by inspection. Then proceed with the solution of the system by an appropriate algebraic method.
40s-30t=60
20s-40t=-50

i got for t=120 and for s 91.5 did i do this right?

anonymous · Answer

@zepdrix

zepdrix · Answer

So it might help to notice that the both the top and bottom equation are divisible by 10, so let's divide a 10 out of everything giving us,

$$\Large 4s-3t=6$$$$\Large 2s-4t=-5$$

zepdrix · Answer

You got 120 for t? Hmm...

anonymous · Answer

yes at first i did but when i did it again i gott=3.2 qnd s=3.9 is that right?

zepdrix · Answer

Oh that's what I got also, yay good job! \c:/

anonymous · Answer

lol thanks