Question

Solve the equation 3|3x-5 |= 30

Answer 1

Answer:

x = 5

Step-by-step explanation:

3|3x-5 |

3 x 3x - 3 x 5

3 x 3x = 9x

3 x 5 = 15

9x - 15 = 30    

add 15 to both sides

9x = 45  

divide each side by 9

x = 5

Answer 2

Answer:

x = 9

or

x = -1

Step-by-step explanation:

3|3x-5 |= 30 Multiply 3 with both 3x and -5

|15x - 15| = 30 then there are two possibilities

15x - 15 = 30 or 15x - 15 = -30

for first equation

15x - 15 = 30 add 15 to both sides of the equation

15x = 45 divide both sides by 15

x = 9

for second equation

15x - 15 = -30 add 15 to both sides

15x = -15 divide by 15

x = -1