Answer:
-3.5g - 4
Explanation:
First, you would organize the equation by placing them into groups that can be combined. This would leave you with the equation: -3g -3g +2.5g -7 +3. Then you would combine like terms by adding -3g, -3g, and 2.5g which would result in -3.5g and adding -7 and 3 which would result in -4. Smush the equation back together to get the end answer of -3.5g - 4.