Question

6) 5x-3y=0, 15x+2y=55.​

Answer 1

$\displaystyle\bf\\\left \{ {{5x-3y=0} \ |\cdot(-3)\atop {15x+2y=55}} \right. \\\\\\+\left \{ {{-15x+9y=0} \atop {15x+2y=55}} \right. \\----------\\11y=55\\\\y=55:11=5\\\\5x=3y=3\cdot5=15\\\\x=15:5=3\\\\Otvet \ : \ (3 \ ; \ 5)$