Answer:
13 - 4x = 1 - x
Subtract 13 from both sides.
-4x = -12 - x
Add x to both sides.
-3x = -12
Divide both sides by -3.
x=4
:)
13-4x=1-x
add the 1x from both side
13-3x=1
subtract the 13 on both sides
-3x=-12
divide -3x on both sides
x=-4
