Answer:
In a box there are [tex]30\ pens[/tex]
Step-by-step explanation:
Let
x------> the number of pens in a box
we know that
[tex]4x-8=112[/tex] ------> equation that represent the situation
Solve for x
Adds [tex]8[/tex] both sides
[tex]4x-8+8=112+8[/tex]
[tex]4x=120[/tex]
Divide by [tex]4[/tex] both sides
[tex]x=120/4=30\ pens[/tex]
