Answer:
5
Step-by-step explanation:
Let x be the number of cell phones with keyboards needed.
40% =
=
x+45 = 40 -----1
x+120 = 100 -----2
You would want to make the total of 1 the same as 2.
1×
: 2.5+112.5 = 100 -----3
Now 2 and 3 are equal.
x+120 = 2.5x+112.5
Isolate the x and numbers.
120-112.5 = 2.5x-x
Simplify.
1.5x = 7.5
x =
× 7.5
x = 5
The manager of the store needs to add 5 more cell phones with keyboards.
Answer:
d
Step-by-step explanation:
just took the test
The answer your looking for is 5
I’m pretty sure the answer would be 8 if u cut 4 in half 4 times