Question

Please write the answer​

Answer 1

Answer:

a) -9+x = -20

x=-11

b) x+9.28=16.25

x=6.97

Answer 2

Step-by-step explanation:

1) x+(-9)=-20

=>x-9=-20

=>x=-20+9

=>x=-11

2)x+9.28=16.25

=>x=16.25–9.28

=>x=8.97