问题
解答题
解方程. 1-
x+(3x-16)÷25%=10(x+1) |
答案
(1)1-
X=3 4 3 5
1-
X+3 4
X=3 4
+3 5
X3 4
+3 5
X-3 4
=1-3 5 3 5
X÷3 4
=3 4
÷2 5 3 4
X=
,8 15
(2)
:3 4
=20:X1 5
X=3 4
×201 5
X÷3 4
=4÷3 4 3 4
X=
;16 3
(3)
=x 3.5 x-16 1.5
3.5(X-16)=1.5X,
3.5X-56=1.5X
3.5X-56+56=1.5X+56
3.5X-1.5X=56
2X=56
X=28,
(4)X+(3X-16)÷25%=10(X+1)
X+(3X-16)×4=10X+10
X+3X×4-16×4=10X+10
13X-64=10X+10
13X-64+64=10X+10+64
13X=10X+74
13X-10X=10X+74-10X
3X=74
X=
.74 3