Question

solve the simultaneous equations 2x-3y= 12 ; 5x +3y=9​

Answer 1

Answer:

y = 4

x= -3/5

Step-by-step explanation:

3y = 12

y = 12/3

y = 4

5x + 3y = 9

put y = 4

5x + 3(4) = 9

5x = 9 - 12

x = -3/5

Answer 2

Answer:

-2

Step-by-step explanation:

2x -3y =12

; 2x = 12+3y

x =( 12 + 3y ) ÷ 2. ________ 1 equation

5x +3y = 9

:5 ( 12 +3y ) + 3y = 9

---------

2

(60 + 15y ) + (3 y ) x2 = 9

------------. ------

2. 1 x2

: 60 + 15y +6y. = 18

21y = 18-60

y = -42

----

21

:: y = -2

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