Solve 31/4-23/7=-1

$$3 \frac { 1 } { 4 } - 2 \frac { 3 } { 7 } = - 1$$

Verify

Solution Steps

Multiply both sides of the equation by 28, the least common multiple of 4,7.

$$7\left(3\times 4+1\right)-4\left(2\times 7+3\right)=-28$$

Multiply 3 and 4 to get 12.

$$7\left(12+1\right)-4\left(2\times 7+3\right)=-28$$

Add 12 and 1 to get 13.

$$7\times 13-4\left(2\times 7+3\right)=-28$$

Multiply 7 and 13 to get 91.

$$91-4\left(2\times 7+3\right)=-28$$

Multiply 2 and 7 to get 14.

$$91-4\left(14+3\right)=-28$$

Add 14 and 3 to get 17.

$$91-4\times 17=-28$$

Multiply -4 and 17 to get -68.

$$91-68=-28$$

Subtract 68 from 91 to get 23.

$$23=-28$$

Compare 23 and -28.

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