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4 Answers
- 8 years ago
From the first equation you can calculate the value of x:
(Do you know cross-multiplication?)
x = (8*3)/5.
From the second equation: y = 1/5.
Therefore the quantity x+6y = (8*3)/5 + 6*1/5 = 6
- Anonymous8 years ago
(1)
5 / 8 = 3 / x
cross-multiply (outer with outer, inner with inner numbers)
5x = 24
divide both sides by 5
x = 24/5
(2)
y = 1/5
x + 6y .................... plug in the value of x from (1)
= 24/5 + 6(1/5)
= 24/5 + 6/5
= 30/5
= 6
- Anonymous8 years ago
solve for x in first equation
x=24/5
plug both x and y into last equation
24/5+6/5=30/5=6
