Answer:
B. Infinitely many
Step-by-step explanation:
5x+48+7x=12(x+4)
multiply 12 to x and multiply 12 to 4
5x+48+7x=12x+48
add 5x to 7x
12x+48=12x+48
the equation of both sides are the same since both equations are the same, the answer is infinitely many.
