Răspuns:
Explicație pas cu pas:
a) 8/(3x+2) = 12/9 <=> 12(3x+2) = 8·9 <=>
12(3x+2) = 72 => 3x+2 = 72:12 => 3x+2 = 6 =>
3x = 6-2 => x = 4/3
b) (x/2):6 = 1/3 <=> 3x/2 = 6 => 3x = 12 =>
x = 12:3 => x = 4
c) (7-x)/3 = 2x/10 => 10(7-x) = 2x·3 =>
5(7-x) = 3x <=> 35 -5x = 3x => 35 = 8x =>
x = 35/8
