Answer:
X=7
Step-by-step explanation:
So first you want x on one side so you so subtract 5x from both sides
Then your equation is 4x-7=21
Because you want x by itself, you add 7 to each side because of additive inverse
The equation is now 4x=28
The last step is to divide 4 from each side and that leaves us with 7
x=7
