The answer is... x=4
4(4) + 7(5) = 51
Hope ive helped!
Answer:
I just answered the other question you asked. Why did you ask the same question twice? Also, I said the 1st one
Step-by-step explanation:
The number will be itself when multiplied by 1.
The sum of twice and half the original number is 1, so the number is
2n +0.5n = 1
2.5n = 1
n = 1/2.5 = 0.4
The original number is 2/5.