Respuesta :
Answer:
-3
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
3x+9=−2(2x+6)
3x+9=(−2)(2x)+(−2)(6)(Distribute)
3x+9=−4x+−12
3x+9=−4x−12
Step 2: Add 4x to both sides.
3x+9+4x=−4x−12+4x
7x+9=−12
Step 3: Subtract 9 from both sides.
7x+9−9=−12−9
7x=−21
Step 4: Divide both sides by 7.
7x/ 7 = −21/ 7
x= -3
The Answer: x = -3
Isolate the variable by dividing each side by factors that don't contain the variable.
