
Richard A. answered 03/27/19
Licensed elementary teacher specializing in math
Hi, Lydia!
$8.00 + $0.12x = $50.00, where x = the number of text messages Mary can send to equal but not exceed a monthly charge of $50.00. Then, solve for x.
8 + .12x = 50
.12x = 50 - 8
.12x = 42
x = 42/.12
x = 350
So, to stay within her budget of $50 a month, Mary can send a maximum number of 350 text messages.
Hope this helps!
Richard