Question

5x-9y-42=?(x+6)-9(y+?)

Answer 1

5 8

Explanation:

Coefficient of x should be 5 so first ? should be 5 let the second ? = z

5×6-9×z=-42

30+42=9z

z=8

Answer 2

5x-9y-42=5(x+6)-9(y+8)

Explanation:

given 5x-9y-42=5x-9y-72+30

=5x+30-9y-72

=5(x+6)-9(y+8)

hence 5x-9y-42=5(x+6)-9(y+8)