One solution. x= 3
1) Let's solve this expression
4(x-3)-x-1=-12 Distribute the factor
4x -12 -x -1 = -12
4x -x -13 = -12 Combine like terms and adding 13 to both sides
3x =-12 +13
3x = 9 Divide both sides by 3
x=3
2) So, the solution is x= 3, and there is one solution because we could find one entry for that.