Toán Lớp 6: Câu 14: (1 đ) Tìm x biết:
a) 12.x – 64 = 25 b) 36 – x : 2 = 16
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Toán Lớp 6: Câu 14: (1 đ) Tìm x biết:
a) 12.x – 64 = 25 b) 36 – x : 2 = 16
Comments ( 2 )
Giải đáp:
12x – 64= 25
12x =25+64
12× =89
x = 89 :12
x=7,41
36- x : 2 = 16
x÷2 =36-16
x ÷2=20
x = 20 ×2
x= 40
x
Câu 14:
a) 12 . x – 64 = 25
=> 12.x = 25 + 64
=> 12 . x = 89
=> x = 89 : 12
=> x = 89/12
b) 36 – x : 2 = 16
=> x : 2 = 36 – 16
=> x : 2 = 20
=> x = 20 . 2
=> x = 40