-(t - -3.49) + 15.64 = 4.17

t=7.98

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

−(t−(−3.49))+15.64=4.17

−t+−3.49+15.64=4.17(Distribute)

(−t)+(−3.49+15.64)=4.17(Combine Like Terms)

−t+12.15=4.17

−t+12.15=4.17

Step 2: Subtract 12.15 from both sides.

−t+12.15−12.15=4.17−12.15

−t=−7.98

Step 3: Divide both sides by -1.

−t/−1=−7.98/−1

t=7.98

19.

step-by-step explanation:

you add the 9 in the tens column since it is a single digit and 9 plus zero is 9 so it is 19