sophie2001sophie
07.01.2021 •
Mathematics
Please help ill give brainliest
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Ответ:
divide by -3 and reverse it
Step-by-step explanation:
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Ответ:
0.04x+0.05y=1100
0.05x+0.04y=1150
Let's multiply each equation by 100:
4x+5y=110000
5x+4y=115000
Now let's add those together:
9x+9y=225000
And we need to find x+y, so we just divide by 9 and get 25,000