Question

Solve the following equation by substitution method.
7x + 2y = -12, 5x - 3y = -13​

Answer 1

Answer:

7x+2y= -12

12+2y=7x

7x= 14

x =14/7

x = 2

Answer 2

Answer:

★Question:-

7x+2y = -12, 5x -3y = -13

Step-by-step explanation:

✰ αиѕωєя:-

$7x + 2y = - 12 - - - (1)$

$5x - 3y = - 13 - - - - - (2)$

$put \: the \: vlue \: 2 \: in \: equation \: 2$

$5x - 3y = - 13$

$2 \times 5x - 2 \times 3y = 2 \times - 13$

$10x - 6y = - 26 - - - - - (3)$

$put \: the \: value \: 3\: in \: equaton \:1$

$7x + 2y = - 12$

$3\times 7x + 3 \times 2y = 3 \times 12$

$21x + 6y = - 36 - - - - - (4)$

$equation \: 3 + 4$

10x -6y = -26

+ 21x +6y =-36

_____________

31x = -62

x = -62/31

x = -2

put the value x = 2 in equation 1

7x +2y = -12

7 ×-2 +2y = -12

-14 +2y = -12

+2y = -12+14

+2y = +2

y = 2/2

y = 1

here is your answer ✍️✍️

x = -2 and y = 1

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