I'm assuming that since 87% failed, that would the remaining 13% was a success. If that assumption is correct, than we simply have to take:
.13 * 13531 = 1759.03 products were successful.
An equation with more than one variable is called a "literal Equation"
Answer:
y=-x+2
x+y=2
Step-by-step explanation:
hopefully this helps :)