The answer is X = 6
Because 3 times 2 x is 6x ... then -1 plus 1 is 0 so it levels out and x is 6
Answer:

Step-by-step explanation:
Let the number be x.
Translating the word problem into an algebraic equation, we have;
Opening the bracket, we have;

Collecting like terms, we have;

Answer: 5x ( x - 5y )
Step-by-step explanation:
The total number of marbles is 30+20+50= 100, so. Since there are 20 red marbles and 50 blue marbles. There are 30+50=80. 80/100=4/5= 80%