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3 × 7 10 + 7 10 × 5 + 2 × 7 10 = 7 10 × ( 3 + 5 + 2 ) = 7 10 × 10 = 70 10 = 7
![](https://rs.olm.vn/images/avt/0.png?1311)
3 × 7 10 + 7 10 × 5 + 2 × 7 10 = 7 10 x 3 + 5 + 2 = 7 10 x 10 = 7
![](https://rs.olm.vn/images/avt/0.png?1311)
3 × 7 10 + 7 10 × 5 + 2 × 7 10 = 7 10 × ( 3 + 5 + 2 ) = 7 10 × 10 = 7
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(710-x\times5=175\)
\(710-x=175\div5\)
\(710-x=35\)
\(x=710-35\)
\(x=675\)
710 - x * 5= 175
x * 5 = 710 - 175
x * 5 = 535
x = 535 : 5
x = 107
710000:710=1000
710000 : 710 = 1000