Final answer:
To solve the given expression, combine like terms and simplify by adding or subtracting the coefficients. The simplified expression is -3.4y - 6.1.
Step-by-step explanation:
To solve the expression 0.4y - 4.3 + y - 1.8 - 4.8y, we simply combine like terms and simplify the expression.
Combining like terms, we have 0.4y + y - 4.8y - 4.3 - 1.8.
Then, we add or subtract the coefficients of y to get the final coefficient. In this case, the coefficients of y are 0.4, 1, and -4.8.
So, 0.4 + 1 - 4.8 = -3.4.
Therefore, the simplified expression is -3.4y - 6.1.