Answer:
x = 3
Step-by-step explanation:
4x+3=15
subtract
4x=12
divide
x=3
[tex]x=3[/tex]
[tex]4x+3=15\\\\4x+3-3=15-3\\\\4x=12\\\\\frac{4x=12}{4}\\\\\boxed{x=3}[/tex]
Hope this helps.