Toán Lớp 6: P=18a+30b+7a-53. Biết a+b=100
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Toán Lớp 6: P=18a+30b+7a-53. Biết a+b=100
Hộ nha
Comments ( 2 )
P
=
18
a
+
30
b
+
7
a
−
5
b
=
(
18
a
+
7
a
)
+
(
30
b
−
5
b
)
=
25
a
+
25
b
=
25
.
(
a
+
b
)
=
25.100
=
2500
P=2500