Solve 64=39*39/25+25-2*39a

$$64 = \frac { 39 \times 39 } { 25 } + 25 - 2 \times 39 a$$

Solve for a

$$a=\frac{7}{25}=0.28$$

Steps for Solving Linear Equation

Multiply both sides of the equation by 25.

$$1600=25\left(\frac{39\times 39}{25}+25\right)-50\times 39a$$

Multiply 39 and 39 to get 1521.

$$1600=25\left(\frac{1521}{25}+25\right)-50\times 39a$$

Convert 25 to fraction \frac{625}{25}.

$$1600=25\left(\frac{1521}{25}+\frac{625}{25}\right)-50\times 39a$$

Since \frac{1521}{25} and \frac{625}{25} have the same denominator, add them by adding their numerators.

$$1600=25\times \frac{1521+625}{25}-50\times 39a$$

Add 1521 and 625 to get 2146.

$$1600=25\times \frac{2146}{25}-50\times 39a$$

Cancel out 25 and 25.

$$1600=2146-50\times 39a$$

Multiply 50 and 39 to get 1950.

$$1600=2146-1950a$$

Swap sides so that all variable terms are on the left hand side.

$$2146-1950a=1600$$

Subtract 2146 from both sides.

$$-1950a=1600-2146$$

Subtract 2146 from 1600 to get -546.

$$-1950a=-546$$

Divide both sides by -1950.

$$a=\frac{-546}{-1950}$$

Reduce the fraction \frac{-546}{-1950} to lowest terms by extracting and canceling out -78.

$$a=\frac{7}{25}$$