Question

8x+5y=3 4x+7y=2 by using subtution method​

Answer 1

here it is..... x = 11 / 36 and y = 1 / 9

1st photo is finding y

2and photo is finding x...

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Answer 2

EXPLANATION.

Equation are:-

=> 8x + 5y = 3 .... (1)

=> 4x + 7y = 2 ..... (2)

From equation (1)

=> 8x = 3 - 5y

=> x = 3 - 5y / 8 .......(1)

put the value of Equation (1) in equation (2)

we get,

$\bold{ \implies{4 \times \frac{(3 \: - \: 5y)}{8} } + 7y \: = 2}$

$\bold{\implies{ \frac{3 \: - \: 5y}{2} } \: + \: 7y \: = \: 2}$

$\bold{ \implies{3 \: - \: 5y} + 14y \: = \: 4}$

=> 9y = 1

=> y = 1/9

put the value of y = 1/9 in equation (1)

we get,

=> x = 3 - 5y / 8

$\bold{ \implies{x \: = \frac{3 \: - \: 5 \times \frac{1}{9} }{8} }}$

=> x = 27 - 5 / 9 / 8

=> x = 22 / 9 / 8

=> x = 22/72

=> x = 11 / 36

Therefore,

value of x = 11/36 and y = 1/9