3 years ago

4x+2y=18, 5x+4y=13 what is the value of x and y

Mathematics

1 answer:

MrRa [10]3 years ago

8 0

Here you go hope it helps

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nordsb [41]

Let

x---------> represents Martin's sister's age

y--------> represents Martin's age

we know that

$y=x-6$ --------> equation $1$

$x+y\leq 22$ --------> equation $2$

Substitute equation $1$ in equation $2$

$x+[x-6]\leq 22\\2x\leq 22+6\\ x\leq 14$

therefore

<u>the answer is</u>

Part a) An inequality that can be used to represent this situation is

$x+[x-6]\leq 22$ or $x\leq 14$

Part b) the oldest age Martin's sister can be is $14$ years old

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