Question

Express the linear equation 7x - 9y =4 in the form ax + by + c and determine the values of a, b and c ​

Answer 1

Step-by-step explanation:

7x+9y=42 ...........(1)

9x+7y=22 ...........(2)

Add equations (1) and (2),

7x+9y+9x+7y=42+22

16x+16y=64

16(x+y)=64

x+y=4