Question

solve 3x + 5y=12;3 x- 5y =12​

Answer 1

Answer:

add two eqns

6x=24

x= 24/6

4

put x=4 in any eqn

3*4+5y=12

12+5y=12

5y=12-12

y=0

Answer 2

Answer:

1. $3x + 5y = 3x - 5y = 0$
2. seen the Two numbers are equal,so
4. $3x + 5y = 12 = 3x - 5y = 12$
5. $3x + 5y - 3x + 5y = 12 + 12$
6. $10y = 24$
7. $y = 24 \10$
8. $y = 3 \5$
9. $3x + 5( \frac{3}{5} ) = 12$
10. $3x + 3 = 12$
11. $3x = 12 - 3$
12. $3x = 9$
13. $x = \binom{9}{3}$
14. $x = 3$
15. $x = 3.y = \binom{3} {5}$
16. 3x+5y=12
17. $3(3) + 5 \times 3 \5 = 12$
18. $9 + 3 = 12$
19. $12 = 12$
20. $- 12 + 12$
21. $= 0$

Step-by-step explanation:

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