Answer:
10
Explanation:
According to the first sentence:
30- x =y
Rearranging the equation:
x+y =30--------(1)
According to the second sentence:
70- 5x =y
Rearranging the equation:
5x +y=70--------(2)
Using the elimination method:
Subtract (2) from (1) as follows:
4x =40
x = 40/4
x =10