tìm 1 số biết rằng khi chia số đó cho 24 và 26 thì đều dư 5 và hiệu 2 thương là 4 .nhớ ghi cách giải
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tìm 1 số biết rằng khi chia số đó cho 24 và 26 thì đều dư 5 và hiệu 2 thương là 4 .nhớ ghi cách giải
Từ đề bài ta có được các đẳng thức sau
x=24.r1+5
x=26.r2+5
r1-r2=2=>r1=r2+2
thay vào biểu thức đầu ta được
x=24.(r2+2)+5=24r2+48+5=24r2+53
=>2r2-48=0
r2=24
x=24.24+5=581
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cộng lại thôi
5+2+4 =11