x:7=31 (dư 3 )
x=31x7+3
x=220
x:8=18(dư 7 )
x=18x8+7
x=151
a. x=31*7+3
x=220
b. x=8*18+7
x=151
DUYỆT NHA
a) x : 7 = 31 (du 3)
=> \(x\)- 3 : 7 = 31
\(x\) - 3 = 31 x 7
\(x\) - 3 = 217
\(x\) = 217 + 3
\(x\) = 220
b) x :8 = 18 (du 7)
=> \(x\)- 7 : 8 = 18
\(x\) - 7 = 18 x 8
\(x\) - 7 = 144
\(x\) = 144 + 7
\(x\) = 151
1.x:7=31(dư 3)
x =31x7+3
x =220
2.x:8=18(dư 7)
x =18x8+7
x =151
x:7=31(dư 3)
x=31*7+3
x=220
x:8=18(dư 7)
x=18*8+7
x=151
x:7=31(dư 3)
x=31x7+3
x=220.
x:8=18(dư7)
x=18x8+7
x=151.
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