Toán Lớp 4: 15 . ( x + 1 ) + 35 = 2 . 10mũ 2
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Toán Lớp 4: 15 . ( x + 1 ) + 35 = 2 . 10mũ 2
Comments ( 2 )
15 . ( x + 1 ) + 35 = 2 . 10^2
=> 15 . ( x + 1 ) + 35 = 2 . 100
=> 15 . ( x + 1 ) + 35 = 200
=> 15 . ( x + 1 ) = 200 – 35
=> 15 . ( x + 1 ) = 165
=> x + 1 = 165 : 15
=> x + 1 = 11
=> x = 11 – 1
=> x = 10
Vậy x = 10