given that x:y = 3:4 and y:z = 5:8 , find the value of 2y divide by 3x-y+2z
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x : y = 3 : 4 y : z = 5 : 8
x : y = 3×5 : 4×5 y : z = 5×4 : 8×4
x : y = 15 : 20 y : z = 20 : 32
x : y : z = 15 : 20 : 32
2y + 3x - y + 2z
3x + y + 2z
3×15 + 20 + 2×32
30 + 20 + 64
114
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