49.686 kg
Step-by-step explanation:
Since the density of the air remains constant in the question
We can represent this equation as a ratio;
10 m³ = 13 kg
(4.2 * 3.5 * 2.6) m³ = ? (x) kg
4.2 * 3.5 * 2.6 = 38.22
We cross multiply
38.22 * 13 = 10 * x
X = 496.86 /10
X = 49.686
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Answer: 10x-6
2(3x+6)+2(2x-4)
=> 6x+12+4x-8
=> 10x-6
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