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`        This is word problem qursqueq attached image i am unable to form equations from given. data .pls solve it if anyone knows`
10 months ago

Monoxdifly
27 Points
```							If pens = x and pencils = yPack I = 3x + 5yPack II = 4x + 3ySuppose the number of Pack I is a and the number of Pack II is b:(3x + 5y)a + (4x + 3y)b = 18x + 19y3ax + 5ay + 4bx + 3by = 18x + 19y(3a + 4b)x + (5a + 3b)y = 18x + 19yLook at the coefficients of x and y in both sides, we get:3a + 4b = 18 … (i)5a + 3b = 19 … (ii)Multiply the equation (i) with 3 and the equation (ii) with 4:9a + 12b = 5420a + 12 b = 76------------------------ –-11a = -22a = 2Substitute a = 2 to the equation (i):3a + 4b = 183(2) + 4b = 186 + 4b = 184b = 12b = 3So, we need to buy 4 packs of Pack I and 3 packs of Pack II.
```
10 months ago
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### Course Features

• 101 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions