They are the same number.
8.4 is 8 units and 4 tenths.
8.40 is 8 units, 4 tenths and zero hundreths.
So, you've actually added nothing! Indeed, you can add as many zeroes as you like at the end of the decimal expansion:
Answer:
idk refrace your question
Step-by-step explanation:
9
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uejejjejejjsjs
i) 3a+2b=9 /*3
9a+6b=27
ii) 8x+6y=60 /: 2
4x+3y=30
5y+6x-40=0
y-2=-6/5(x-5)
5y-10=-6(x-5)
5y-10=-6x+30
5y+6x-10-30=0
