Solve 25-4-9x+2x - ScanMath

Question

Simplify the expression

21 - 7 x

Evaluate

25 - 4 - 9 x + 2 x

Subtract the numbers

21 - 9 x + 2 x

Solution

More Steps

Evaluate

- 9 x + 2 x

Collect like terms by calculating the sum or difference of their coefficients

(- 9 + 2) x

Add the numbers

- 7 x

21 - 7 x

Show Solution

7 (3 - x)

Evaluate

25 - 4 - 9 x + 2 x

Subtract the numbers

21 - 9 x + 2 x

Add the terms

More Steps

Evaluate

- 9 x + 2 x

Collect like terms by calculating the sum or difference of their coefficients

(- 9 + 2) x

Add the numbers

- 7 x

21 - 7 x

Solution

7 (3 - x)

Show Solution

x = 3

Evaluate

25 - 4 - 9 x + 2 x

To find the roots of the expression,set the expression equal to 0

25 - 4 - 9 x + 2 x = 0

Subtract the numbers

21 - 9 x + 2 x = 0

Add the terms

More Steps

Evaluate

21 - 9 x + 2 x

Add the terms

More Steps

Evaluate

- 9 x + 2 x

Collect like terms by calculating the sum or difference of their coefficients

(- 9 + 2) x

Add the numbers

- 7 x

21 - 7 x

21 - 7 x = 0

Move the constant to the right-hand side and change its sign

- 7 x = 0 - 21

Removing 0 doesn't change the value,so remove it from the expression

- 7 x = - 21

Change the signs on both sides of the equation

7 x = 21

Divide both sides

\frac{7 x}{7} = \frac{21}{7}

Divide the numbers

x = \frac{21}{7}

Solution

More Steps

Evaluate

\frac{21}{7}

Reduce the numbers

\frac{3}{1}

Calculate

3

x = 3

Show Solution