Question

30(i1-i2)-15i2=0
30i1+15i2=24

Answer 1

posted

Answer 2

equation 1) 30i1 - 30i2 - 15i2 = 0
30i1 - 45i2 = 0


equation 2) 30i1 + 15i2 = 24
30i1 = 24 - 15i2


equation 1) 24 - 15i2 - 45i2 = 0 (I am substituting here)
-60i2 = -24
24 = 60i2
24/60 = 60i2/60
0.4 = i2

now we now what is i2 we can work out i1

equation 2) 30i1 + 15(0.4) = 24
30i1 + 6 = 24
30i1 = 24 - 6
30i1 = 18
30i1 / 30 = 18 / 30
i1 = 0.6

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Answer 3

thanks so how well do u know matrices