Răspuns :
Răspuns:
(a+b)/(a-b)=6 =>a+b=6a-6b
3a-2b=66 =>3a=66+2b =>a=(66+2b)/3
(66+2b)/3 + b = 2(66+2b) - 6b
66+2b+3b=6(66+2b)-18b
66+5b=396-6b
11b=396-66
11b=330 =>b=30 =>a=42
Răspuns:
Explicație pas cu pas:
(a+b)/(a-b)=6 a+b=6a-6b 5a-7b=0 (-2) -10a+14b=0
3a-2b=66 3a-2b=66 3a-2b=66 (7) 21a-14b=7×66
................................
11a=7×66 a=7×6
a=42
b=5a/7=5×42/7=5×6=30