Question

(iv) If 15x +
If 15x + 17y = 21 and 17x + 15y = 11, then find the value
of x + y.​

Answer 1

Answer:

15x+17y=21

17y=21-15x

y=(21-15x)/17

17x+15y=11

$17x+ 15 \times \frac{(21 - 15x)}{17}= 11$

$\frac{289x + 315 - 225x}{17} = 11$

$64x + 315 = 187$

$64x = 187 - 315$

$64x = - 128$

$x = - 2$

$y = (21 - 15 \times - 2) \div 17$

$y = (21 + 30) \div 17$

$y = 51 \div 17$

$y = 3$

Answer 2

Answer:

I hope it helps you....

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