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