Question

3. By equating coefficients of variables solve the
following equations.
(i) 3x – 4y = 7; 5x + 2y = 3​

Answer 1

Answer:

2/5

Step-by-step explanation:

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Answer 2

$\huge\bold\green{Solution}$

$(i) 3x – 4y = 7 \: \: (1)$

$ii)5x + 2y = 3 \: \: (2)$

Multiplying equation (2) by 2,

$10x + 4y = 6 \: \: (3)$

Adding equation (1) and (3),

$3 \:x – 4y = 7 \: \: (1) \\ \\ 10x + 4y = 6 \: \: (3) \\ ▬▬▬▬▬▬▬▬▬▬ \\ 13x \: \: \: \: = 13 \\ x = 1$

Put x=1 in equation (2)

$5(1) + 2y = 3$

$2y = 3 - 5$

$2y = - 2$

$y = - 1$

$\huge\bold\red{final \: - Solution}$

$(1, - 1) \: is \: solution$

$\huge\boxed{\dag\sf\red{Thanks}\dag}$