Tìm x biết a) x -1/2 = 2/9 + -1/5 b) x/10 = 3/15 -1/2
Giải thích
a)
x−12=29+−15x−12=1045+−945x−12=145x=1045+12x=2090+4590=6590=1318
b)
x10=315−12=−930=−310x=−3
a)
x−12=29+−15x−12=1045+−945x−12=145x=1045+12x=2090+4590=6590=1318
b)
x10=315−12=−930=−310x=−3