［文字サイズの変更］
▼
▲
©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 次の等式を[ ]内の変数について解きなさい．
[181-20]
(1)
3
[
y
]
x
=
−
y
4
(2)
3
[
w
]
u
=
v
w
5
(3)
1
[
z
]
x
=
y
z
3
(4)
1
2
[
v
]
u
=
v
w
3
(5)
3
[
b
]
a
=
b
4
(6)
1
[
b
]
a
=
b
c
4
(7)
2
3
[
y
]
x
=
−
y
z
5
(8)
6
[
b
]
a
=
−
b
5
(9)
1
2
[
b
]
a
=
−
b
c
4
(10)
1
2
[
c
]
a
=
b
c
2
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
3
[
y
]
x
=
−
y
4
3
−
y
4
=
x
y
4
=
−
x
3
(2)
3
[
w
]
u
=
v
w
5
3
v
w
5
=
u
w
5
u
=
3
v
(3)
1
[
z
]
x
=
y
z
3
1
y
z
3
=
x
z
3
x
=
y
(4)
1
2
[
v
]
u
=
v
w
3
1
2
v
w
3
=
u
v
3
u
=
2
w
(5)
3
[
b
]
a
=
b
4
3
b
4
=
a
b
4
=
a
3
(6)
1
[
b
]
a
=
b
c
4
1
b
c
4
=
a
b
4
a
=
c
(7)
2
3
[
y
]
x
=
−
y
z
5
2
3
−
y
z
5
=
x
y
5
x
=
−
3
2
z
(8)
6
[
b
]
a
=
−
b
5
6
−
b
5
=
a
b
5
=
−
a
6
(9)
1
2
[
b
]
a
=
−
b
c
4
1
2
−
b
c
4
=
a
b
4
a
=
−
2
c
(10)
1
2
[
c
]
a
=
b
c
2
1
2
b
c
2
=
a
c
2
a
=
2
b