|
(1)2x-
x=1.2,4 5
x(2-
)=1.2,4 5
x=1.2,6 5
x÷6 5
=1.2÷6 5
,6 5
x=1;
(2)9×3-1.7x=13.4,
27-1.7x=13.4,
27-1.7x+1.7x=13.4+1.7x,
13.4+1.7x=27,
13.4+1.7x-13.4=27-13.4,
1.7x=13.6,
1.7x÷1.7=13.6÷1.7,
x=8.
|
(1)2x-
x=1.2,4 5
x(2-
)=1.2,4 5
x=1.2,6 5
x÷6 5
=1.2÷6 5
,6 5
x=1;
(2)9×3-1.7x=13.4,
27-1.7x=13.4,
27-1.7x+1.7x=13.4+1.7x,
13.4+1.7x=27,
13.4+1.7x-13.4=27-13.4,
1.7x=13.6,
1.7x÷1.7=13.6÷1.7,
x=8.