Answer:
X = 10
Explanation:
Multiply both sides of the equation by 5
x + 2x - 60 = -30
Collect like terms
3x - 60 = -30
Move constant to the right-hand side and change its sign
3x = -30 + 60
Calculate the sum
3x = 30
Divide both sides of the equation by 3
x = 10
Solution
x = 10