Solve (7-a)-21a - ScanMath

Evaluate

(7 - a) - 21 a

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

(7 - a) - 21 a = 0

Remove the parentheses

7 - a - 21 a = 0

Subtract the terms

More Steps

7 - 22 a = 0

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

- 22 a = 0 - 7

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

- 22 a = - 7

Change the signs on both sides of the equation

22 a = 7

Divide both sides

\frac{22 a}{22} = \frac{7}{22}

Solution

a = \frac{7}{22}

Alternative Form

a = 0.3 \dot{1} \dot{8}

Simplify the expression