Question

wyznacz c ze wzoru

c) 1/a - 3/2c= 2/c

d) 2/c = a/4+b/4

Answer 1

c) 1/a=2/c+3/ac

1/a=(4+3)/2c

1/a=7/2c

2c=7a

c=7/2a

 

d) 2/c=(a+b)/4

c=8/(a+b)

Answer 2

c ) 1/a - 3/2c = 2/c    I*c

c/a - 3/2 = 2

c/a = 2 + 3/2

c/a = 7/2      I*a

c = 7/2 a

d ) 2/c = (a+b)/4     I*c

2 = (a+b)*c/4    I* 4

8 = (a+b)*c

c*(a+b) = 8     I: (a+b)

c = 8/(a+b)