3) Expand both sides of the equation:

8(9) + 8(2x) = 5(2) - 5(3x)

72 + 16x = 10 - 15x

Combine like terms:

16x + 15x = 10 - 72

31x = -62

Divide by 31 to solve for x:

x = -62/31

x = -2

Therefore, the solution for the equation is x = -2.

4) Solve for x in the second equation:

29.3 - (x + 5.6) = 15.8

29.3 - x - 5.6 = 15.8

23.7 - x = 15.8

Subtract 23.7 from both sides:

Divide by -1 to solve for x:

x = 7.9

Therefore, the solution for the equation is x = 7.9.