Question

Verify by substitution:

4x by 7 - 12 = 0 is 21

Please solve this i will mark it to brainlist​

Answer 1

Step-by-step explanation:

by cross multiple we get

4x-84=0 and then sol. is 21ans.

Answer 2

Answer:

39.75

Step-by-step explanation:

4x/7-12=21

4x-12=21×7

4x-12=147

4x=147+12

4x=159

x=159/4

=39.75