Answer: 6
Step-by-step explanation: To solve we first start by adding like terms in our equation which is 30 + 54 = x(5+9) which becomes 84=x(14). Now we need to isolate the x variable by dividing both sides by 14.
x(14) ÷ 14 = x, 84 ÷ 14 = 6
This leaves us with the answer x = 6