解方程。
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(1)x+ =![]() x= ![]() | (2) -x=![]() x= ![]() |
(3)x+ = +![]() x+ =![]() x= ![]() | (4)x-( + )=![]() x- =![]() x= ![]() |
(5) -x- =![]() x= -![]() x= ![]() | (6)x- - =3.2x- =3.2x=3.7 |
| (7)3.2x-0.6×0.8= 4.32 3.2x-0.48= 4.32 3.2x= 4.8 x=1.5 | (8)1.3x+1.4x=54 2.7x=54 x=20 |
| (9)(x-1.3)÷2=2.2 x-1.3= 4.4 x=5.7 | (10)6.25×4.4-0.5x=17 27.5-0.5x=17 x=21 |
=
-x=
+
)=
=3.2


=
=3.2