|5x + 10| - 15 = 20 x = 9 and x = -9 x = 5 & x = -9 x = 5 & x = -2 x = -1 & x = -3

First, let's isolate the absolute value:

|5x + 10| = 35

Now open up the absolute values:

5x + 10 = 35

5x + 10 = -35

5x = 25

5x = -45

x = 5

x = -9

Option B. is the answer

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

soo this can be solve by using the formula:

f = p( 1 + i)^ n

where f is the future profit

p is the initial profit

i is the percent increase

n is the number of years

a . f = 30000 ( 1.05)^n

b. f = 30000 ( 1.05)^15

f = $62,368