solve the simultaneous enq.3x-5y=5and 9x-2y=7 using substitution method
Answers
Answer:
Living Things Non- Living Things
Living things are made up of living cells
Non-living things are not made up of cells
Require food, air and water
Do not require food, air and water
Growth is present
Growth is absent
Reproduction is present
Reproduction absent
Respiration present
Respiration absent
They can move on their own
They cannot move on their own
They are sensitive and respond to changes around them
They are not sensitive and do not respond to changes around them
They excrete and get rid of waste materials from their body
They do not excrete
Living things have a definite life span after which they die
Non-living things do not have definite life cycle
Step-by-step explanation:
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let
3x-5y=5.......(1)
9x-2y=7....... (2)
by eq(1)
3x-y=5/-5=-1
=>-y=-1/3x=>y=1/3(x).......(3)
by putting value of y in eq(2),we get
9x-2/3x=7
=>9x^2-2/3x=7
=>9x^2/3x-2/3x=7
=>3x-2/3x=7
=>3x=7+2/3x
=>x=7+2=9
by putting value of x in eq(3),we get
y=1/3×9
=3×1=3
Hence the solution is
(x,y)=(9,3)
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