15.5+4.2t=3.32

Subtract 15.5 from both sides of the equation.

4.2t=3.32-15.5

Subtract 15.5 from 3.32.

4.2t=-12.18

4.2t=-12.18

Divide each term in 4.2t=-12.18 by 4.2.

4.2t4.2=-12.184.2

Cancel the common factor of 4.2.

t=-12.184.2

Divide -12.18 by 4.2.

t=-2.9

t=-2.9

Solve for t 15.5+4.2t=3.32