3x + 2(x + 5) = -2(x - 9) - 15
please give the answer and step-by-step

x = -1

Step-by-step explanation:

Expand 2(x +5 ): 2x +10

Expand -2(x - 9) - 15: -2x + 3

Subtract 10 from both sides

Simplify it

Add 2x to both sides

Simplify it

Divide both sides by 7

Simplify it again...it will be x = -1

x=60

Step-by-step explanation:

So basically the sum of interior angle of a triangle is 180.

Add all the values and make it equal to 180.

x+3/2x+1/2x=180

Then find x

3x=180

x=180/3

x=60 degrees