Gọi số bị trừ là a số trừ là b ta có
a-b=3.5(*)
4b-a=7.36(**)
Cộng vế với vế của (*) với (**) ta được
3b=10.86
=>b=3.62
=>a=3.62+3.5=7.12
Vậy số bị trừ là 7.12
7,12 la dung 1000000000000000000000000000000000000000000000000000000000000000000000000000000000%
k cho mk nhe!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
7,12 dung roi 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000% luon do
