Answer:
X = 9
Explanation:
7x + 3x - 18= 6(x+3)
7x + 3x = 10x - 18 = 6(x+3)
10x - 18 = 6(x+3) convert that into (distribute) 6x + 18
+18 +18 (add 18 to both sides)
Simplify: 10x + 6x + 36 (subtract 6x form both sides)
-6 -6
Simplify: 4x = 36 (divide each by 4)
_ _
4 4
Simplify: x = 9