exam Maths Puzzle Numerical Ability

3x-4y=8;(-6,5)

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exam Other Question

If 5 times the first number plus three times the second number eaguals 47, and 10 times the first number minus 4 times the second number equals 54, what are the numbers? Please assist with finding the ratio 1/5 to 0.85 as a fraction in lowest terms.

Work Done:

I attempted to have 1/5 = (.85)/x. I got x= 4/17. The choices for answers are 4/15, 4/17, & 4/19. I just to make sure I got the answer correct. Thanks.