Please solve the following using the most efficient method .

Y = 3x + 7
Y = -4x + 21

1. x=1/3y+-7/3

2. x=−1/4y+21/4

Step-by-step explanation:

answer: since the question is talking about growth you have to use the growth formula which is inital amount (1 + growth)^time

step-by-step explanation:

the intial amount is 1200, the growth is 4.8, and the time is 7. plug those numbers into the equation, also i think you have to change 4.8 into a percent. but, i have forgotton how to do that. if this is a online class go on to the lesson.

answer: this is not a question

step-by-step explanation: this is a answer