Question

Znajdź liczby oznaczone literami.
3(a-1)= -a
1-0,2b=0,3b
c+1/2 = c/3

Answer 1

3a - 3 = -a
3a + a = 3
4a = 3
a = 3/4

1 - 0,2b = 0,3b
1 = 03,b + 0,2 b
1 = 0,5b
b = 2

c + 1/2 = c/3
c- c/3 = -1/2   /x6
6c -2c = -3
4c = -3
c= - 3/4