Need help with simple question

Mathematics

1 answer:

KiRa [710]3 years ago

4 0

Answer:

I think it is 10

Step-by-step explanation:

I said I think it might be 9

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Me ajudaa por favor, é urgente

Zigmanuir [339]

Answer: x=16 kg.

Step-by-step explanation:

$\displaystyle\\x+x+\frac{1}{2}x=40\\\\ 2\frac{1}{2}x=40\\\\\frac{(2*2+1)}{2}x=40\\\\ \frac{5}{2} x=40\\\\Multiply\ both\ sides\ of\ the\ equation\ by\ 2:\\\\\frac{5}{2}x*2 =40*2\\\\5x=80\\\\Divide\ both\ sides\ of\ the\ equation\ by\ 5:\\\\x=16\ kg.$