Question

What should be added to 3a + 2b - 7 to get -a + b + 1 ?
algebra please tell whole formula​

Answer 1

Answer:

-a+b-2a+2b-7

Step-by-step explanation:

-a+b+1-3a+2b-7

-a+b-2a+2b-7

Answer 2

Given :

2 equations: 3a + 2b - 7 and -a + b + 1

To find :

An equation that should be added to

3a + 2b - 7 to get -a + b + 1

Solution :

we know linear equations are equal to 0

3a + 2b -7 = 0

=> 3a + 2b = 7 ------ (1)

-a + b + 1= 0

-a + b = -1

(multiplying with -1 throughout)

=> a - b = 1 -------- (2)

kn order to get (2) from one (1) by adding another equation (say (3)), we must subtract (1) from (2)

a - b = 1

3a + 2b= 7

(-). (-). (-)

---------------------

-2a - 3b = -6

=> -2a - 3b + 6 = 0

Therefore, the equation that should be added to a + 2b -7 to get -a + b + 1 is

-2a - 3b + 6.