Question

hey moderators tell me how the 1st equation become from
-a+9b+4=0???????give the right explanation...​

Answer 1

Answer:

Signs changes when it is trasfered to other side of equal to

6a +2b -4 = 7a - 7b

6a - 7a +2b +7b - 4 = 0

          now, add all the like terms

6a-7a = -a

2b+7b = 9b

∴ equation = 9b -a -4 =0

Answer 2

Sign changes as you move equation from one side to another.

Whenever + moves to another side it will be - ( vice -versa)

Whenever × moves to another side it will be ÷ (vice-versa)

See below how sign changes

-a+9b-4=0

-a=4-9b

a-9b+4=0