Question

a×a+a=90
b+b×a=70
b×c=42
b×c-a=?​

Answer 1

Answer:

1.a*b=2a 2a+a=90

3a=90

a=90/3

a=30

2.b+b=2b

2b*b=2b=70

2b=70

b=70/2

b=35

3.b*c=42

bc=42

Step-by-step explanation:

see I don't know 4th one

I think it will help you