Question

tìm X

X x 2,9 + X : 10 = 1,05

Answer 1

X.2,9+X:10=1,05

=>X.2,9.10+X=1,05.10

=>29.X+X=10,5

=>30.X=10,5

=>X=10,5:30=0,35

Answer 2

=>X x2,9+X x1/10=1,05

=>X x(2,9+1/10)=1,05

=>X x3=1,05

X=1,05:3

X=0,35

Answer 3

X x2,9 + X:10 =1,05

X x 2,9 +X =10,5  

2X x 2,9 =10,5

2X = 10,5 : 2,9

2X =                                                                             

X=7,6:2

X=3,8