21. If 2x + y = 35, 3x + 4y = 65, find the value of
y
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Step-by-step explanation:
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Answered by
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Answer:
x=17
y=1
Step-by-step explanation:
2x+y=35 -----(1)
3x+4y=65 ----(2)
2x+y=35=-2x-y=-35=-8x-4y=-140 -----(3)
Adding (2) and (3) we get
3x-8x+4y-4y=65-140
-5x=-85
x=17
Now substituting
2x+y=35
34+y=35
y=1
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