To solve this equation, first distribute the coefficients:

1.8m - 4.2 - 3.2m + 4 - (-1.7) + 1.4m = 1.5

Combine like terms:

1.8m - 3.2m + 1.4m - 4.2 + 4 + 1.7 = 1.5

Simplify:

0.0m + 1.0 = 1.5

This equation simplifies to:

1 = 1.5

Since this is not a true statement, there is no solution to the original equation.