［文字サイズの変更］
▼
▲
©2023 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．
[182-00]
(1)
7
(
a
＋
b
＋
c
)
[
b
]
X
=
4
(2)
y
＋
z
[
z
]
x
=
8
(3)
y
＋
z
[
y
]
x
=
9
(4)
[
c
]
a
=
7
(
9
b
＋
c
)
＋
4
(5)
(
v
＋
w
)
B
[
w
]
u
=
6
(6)
[
r
]
m
=
7
(
p
＋
q
＋
r
)
(7)
[
p
]
m
=
7
(
p
＋
q
＋
r
)
(8)
7
(
y
＋
z
)
[
z
]
S
=
x
(9)
(
q
＋
r
)
l
[
r
]
p
=
2
(10)
7
(
u
＋
v
＋
w
)
[
v
]
A
=
9
©2023 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
7
(
a
＋
b
＋
c
)
[
b
]
X
=
4
7
(
a
＋
b
＋
c
)
4
=
X
a
＋
b
＋
c
4
=
X
7
b
4
=
X
−
a
−
c
7
(2)
y
＋
z
[
z
]
x
=
8
y
＋
z
8
=
x
y
＋
z
=
8
x
z
=
8
x
−
y
(3)
y
＋
z
[
y
]
x
=
9
y
＋
z
9
=
x
y
＋
z
=
9
x
y
=
9
x
−
z
(4)
[
c
]
a
=
7
(
9
b
＋
c
)
＋
4
7
(
9
b
＋
c
)
=
a
−
4
9
b
＋
c
a
−
4
=
7
c
1
4
=
a
−
9
b
−
7
7
(5)
(
v
＋
w
)
B
[
w
]
u
=
6
(
v
＋
w
)
B
6
=
u
v
＋
w
6
u
=
B
w
6
u
=
−
v
B
(6)
[
r
]
m
=
7
(
p
＋
q
＋
r
)
7
(
p
＋
q
＋
r
)
=
m
p
＋
q
＋
r
1
=
m
7
r
1
=
m
−
p
−
q
7
(7)
[
p
]
m
=
7
(
p
＋
q
＋
r
)
7
(
p
＋
q
＋
r
)
=
m
p
＋
q
＋
r
1
=
m
7
p
1
=
m
−
q
−
r
7
(8)
7
(
y
＋
z
)
[
z
]
S
=
x
7
(
y
＋
z
)
x
=
S
y
＋
z
x
S
=
7
z
x
S
=
−
y
7
(9)
(
q
＋
r
)
l
[
r
]
p
=
2
(
q
＋
r
)
l
2
=
p
q
＋
r
2
p
=
l
r
2
p
=
−
q
l
(10)
7
(
u
＋
v
＋
w
)
[
v
]
A
=
9
7
(
u
＋
v
＋
w
)
9
=
A
u
＋
v
＋
w
9
=
A
7
v
9
=
A
−
u
−
w
7