Question

plz answer this plz ok it urgent ​

Answer 1

Step-by-step explanation:

$4x - 9x = - 20 \: \: \: \: \: and \: x = 4$

$4(4) - 9(4) = - 20$

$16 - 36 = - 20$

$- 20 = - 20$

Since, LHS = RHS

hence, it satisfies the solution..

Answer 2

Step-by-step explanation:

4x-9x=-20

put x=4 to check

4*4-9*4

16-36

-20

so it is satisfying the equation