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ValentinkaMS [17]
3 years ago
15

A boy had 4 marbles and lost one. How many marbles does he have now?

Mathematics
1 answer:
AVprozaik [17]3 years ago
6 0

Answer:

3

Step-by-step explanation:

4-1

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2 years ago
Solving linear system, substitution<br><br> 20x-30y=-50<br> x+2y=1<br><br> HELP PLEASE
hjlf
20x -  30y = -50 ⇒ 20x -  30y = -50
    x +   2y = -1   ⇒ <u>20x + 40y = -20</u>
                                       <u>-70y</u> = <u>-30</u>
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                                            y = ³/₇
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                             <u>      + 12⁶/₇  + 12⁶/₇
</u>                                        <u>20x</u> = <u>47¹/₇
</u>                                         20<u />       20<u>
</u>                                            x = 2⁷/₂₀
                                      (x, y) = (2⁷/₂₀, ³/₇)
6 0
3 years ago
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