Answer:
Its an increase
30 to 90
I= 100 x (f-i)/i
I= 100 x 90-30/30
I= 100 x 2
200% increase
x =4
Step-by-step explanation:
2/3(x-7)= -2
Multiply each side by 3/2 to clear the fractions
3/2 * 2/3(x-7)= -2 *3/2
x-7 = -3
Add 7 to each side
x-7+7 = -3+7
y = 3x + 7
