Tìm x a) 3x/13 = 45/-26 . -2/5 b) (13/21 - 3/2) . 21/13 + x = 4/13
Giải thích
a)
3.x13=45−26.−253.x13=9133.x=9x=3
b)
1321−32.2113+x=413−2742.2113+x=413−2726+x=413x=413−−2726x=3526
a)
3.x13=45−26.−253.x13=9133.x=9x=3
b)
1321−32.2113+x=413−2742.2113+x=413−2726+x=413x=413−−2726x=3526