Toán Lớp 7: Tìm x, biết:
a)15/x=5/3 b)1/2^x+1 – 1/2 * 3^x
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Toán Lớp 7: Tìm x, biết:
a)15/x=5/3 b)1/2^x+1 – 1/2 * 3^x
Comments ( 1 )
A) 15/X=5/3
⇒15.3=X.5
⇒45=X.5
⇒X=45:5
⇒X=9
VẬY X=9