Answer:
0.4
Step-by-step explanation:
you just have to divide
2÷5=0.4
Can you tell me by how many dollars has the price risen
To answer the question let x be the amount of money James will have after he sees Rita. If it was him who owed Rita $12 and he intent to pay, he will have $42.80 - $12 after seeing her. However, if it was Rita who owed him the amount, the money he will have after seeing her will be $42.80 + $12. Thus, the equations are,
x = 42.80 - 12 and x = 42.80 + 12
Answer:
Step-by-step explanation:

multiply by
on each side

add 1 on both sides 
make it equal 0

Factor

answer is 3 and -1

Cross multiplying, we get:

Thus the value of y for given proportion is 18.