Toán Lớp 5: Tìm x : x * 4 + x * 5 + x = 100
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Toán Lớp 5: Tìm x : x * 4 + x * 5 + x = 100
Comments ( 2 )
Đáp án:
x . 4 + x . 5 + x = 100
x .( 4 + 5 + 1 ) = 100
x . 10 = 100
x = 100 : 10
x = 10
Vậy x=10.