Given that 3x - 5y = 2
Find x when y = 8

x = 14

Step-by-step explanation:

Given

3x - 5y = 2 ← substitute y = 8 into the equation

3x - 5(8) = 2

3x - 40 = 2 ( add 40 to both sides )

3x = 42 ( divide both sides by 3 )

x = 14

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

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