3x+1=13

Subtract 1 from both sides of the equation.

3x=13-1

Subtract 1 from 13.

3x=12

3x=12

Divide each term in 3x=12 by 3.

3×3=123

Cancel the common factor of 3.

Cancel the common factor.

3×3=123

Divide x by 1.

x=123

x=123

Divide 12 by 3.

x=4

x=4

Solve for x 3x+1=13