Respuesta :

hi!! so here i’ll explain: for the first one, a times 3 is 3a. so you have 3a=-30. then you divide both sides by 3 and you have a=-10!! do the same for the rest, hope this helps

Answer:

1. a=-10

2. b=5

3. c=-1068

4. d=-1000

Step-by-step explanation:

You just have to make sure both sides are equal.