Solve 7x-21=3x 7 - ScanMath

Evaluate

7 x - 21 = 3 x \times 7

Multiply the terms

7 x - 21 = 21 x

Move the variable to the left side

7 x - 21 - 21 x = 0

Subtract the terms

More Steps

- 14 x - 21 = 0

Move the constant to the right side

- 14 x = 0 + 21

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

- 14 x = 21

Change the signs on both sides of the equation

14 x = - 21

Divide both sides

\frac{14 x}{14} = \frac{- 21}{14}

Divide the numbers

x = \frac{- 21}{14}

Solution

More Steps

x = - \frac{3}{2}

Alternative Form

x = - 1.5

Solve the equation