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Thepotemich [5.8K]
3 years ago
14

Please I need help

Mathematics
2 answers:
ArbitrLikvidat [17]3 years ago
4 0

Answer:

  (x, y) = (-3 5/8, 1 5/16)

Step-by-step explanation:

Add y+14 to the second equation to get ...

  3.5x +14 = y

Substitute this for y in the first equation:

  2.5x -3(3.5x +14) = -13

  2.5x -10.5x -42 = -13

  -8x = 29

  x = -29/8 = -3 5/8

Using this in the formula for y, we get ...

  3.5(-29/8) +14 = y

  -203/16 +14 = y = 21/16 = 1 5/16

seraphim [82]3 years ago
4 0

Answer : The value of x and y is, 4 and 27 respectively.

Step-by-step explanation :

The given equations are:

2.5x-3y=-13       ...........(1)

3.25x-y=-14      .........(2)

or,

y=3.25x+14     ..........(3)

Now put equation 3 in 1, we get the value of 'x'.

2.5x-3y=-13

2.5x-3(3.25x+14)=-13

2.5x-9.75x-42=-13

-7.25x=-13+42

-7.25x=29

x=-\frac{29}{7.25}

x=-4

Now put the value of 'x' in equation 3, we get the value of 'y'.

y=3.25x+14

y=3.25(4)+14

y=13+14

y=27

Therefore, the value of x and y is, 4 and 27 respectively.

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