Solve 21*7/6-21*6/7=39

$$\frac { 21 \times 7 } { 6 } - \frac { 21 \times 6 } { 7 } = 39$$

Verify

Solution Steps

Multiply both sides of the equation by 42, the least common multiple of 6,7.

$$7\times 21\times 7-6\times 21\times 6=1638$$

Multiply 7 and 21 to get 147.

$$147\times 7-6\times 21\times 6=1638$$

Multiply 147 and 7 to get 1029.

$$1029-6\times 21\times 6=1638$$

Multiply -6 and 21 to get -126.

$$1029-126\times 6=1638$$

Multiply -126 and 6 to get -756.

$$1029-756=1638$$

Subtract 756 from 1029 to get 273.

$$273=1638$$

Compare 273 and 1638.

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