［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)
1
[
y
]
x
=
−
y
2
(2)
1
3
[
b
]
a
=
b
c
3
(3)
1
[
w
]
u
=
v
w
2
(4)
1
2
[
q
]
p
=
q
r
3
(5)
2
[
r
]
p
=
q
r
3
(6)
4
[
y
]
x
=
−
y
5
(7)
2
[
b
]
a
=
−
b
5
(8)
1
3
[
b
]
a
=
b
c
2
(9)
2
[
y
]
x
=
y
3
(10)
1
2
[
v
]
u
=
−
v
w
3
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
1
[
y
]
x
=
−
y
2
1
−
y
2
=
x
y
=
−2
x
(2)
1
3
[
b
]
a
=
b
c
3
1
3
b
c
3
=
a
b
3
a
=
3
c
(3)
1
[
w
]
u
=
v
w
2
1
v
w
2
=
u
w
2
u
=
v
(4)
1
2
[
q
]
p
=
q
r
3
1
2
q
r
3
=
p
q
3
p
=
2
r
(5)
2
[
r
]
p
=
q
r
3
2
q
r
3
=
p
r
3
p
=
2
q
(6)
4
[
y
]
x
=
−
y
5
4
−
y
5
=
x
y
5
=
−
x
4
(7)
2
[
b
]
a
=
−
b
5
2
−
b
5
=
a
b
5
=
−
a
2
(8)
1
3
[
b
]
a
=
b
c
2
1
3
b
c
2
=
a
b
2
a
=
3
c
(9)
2
[
y
]
x
=
y
3
2
y
3
=
x
y
3
=
x
2
(10)
1
2
[
v
]
u
=
−
v
w
3
1
2
−
v
w
3
=
u
v
3
u
=
−
2
w