［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
[
b
]
a
=
−
b
4
(3)
1
3
[
c
]
a
=
−
b
c
2
(4)
1
3
[
q
]
p
=
−
q
r
3
(5)
1
[
v
]
u
=
v
2
(6)
4
3
[
v
]
u
=
−
v
w
5
(7)
1
3
[
q
]
p
=
q
r
3
(8)
1
3
[
z
]
x
=
y
z
3
(9)
1
[
b
]
a
=
b
2
(10)
3
2
[
c
]
a
=
b
c
5
©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
[
b
]
a
=
−
b
4
1
−
b
4
=
a
b
=
−4
a
(3)
1
3
[
c
]
a
=
−
b
c
2
1
3
−
b
c
2
=
a
c
2
a
=
−
3
b
(4)
1
3
[
q
]
p
=
−
q
r
3
1
3
−
q
r
3
=
p
q
3
p
=
−
3
r
(5)
1
[
v
]
u
=
v
2
1
v
2
=
u
v
=
2
u
(6)
4
3
[
v
]
u
=
−
v
w
5
4
3
−
v
w
5
=
u
v
5
u
=
−
3
4
w
(7)
1
3
[
q
]
p
=
q
r
3
1
3
q
r
3
=
p
q
3
p
=
3
r
(8)
1
3
[
z
]
x
=
y
z
3
1
3
y
z
3
=
x
z
3
x
=
3
y
(9)
1
[
b
]
a
=
b
2
1
b
2
=
a
b
=
2
a
(10)
3
2
[
c
]
a
=
b
c
5
3
2
b
c
5
=
a
c
5
a
=
2
3
b