Question

 -3(3y+4)+4(2y+3)=15​

Answer 1

-3 ( 3y + 4 ) + 4 ( 2y + 3 ) = 15​

-9y - 12 + 8y + 12 = 15

-9y + 8y = 15

-y = 15

y = -15

Answer 2

Ответ:

$y=-15$

Пошаговое объяснение:

$-3\cdot\Big(3\cdot y+4\Big)+4\cdot\Big(2\cdot y+3\Big)=15\\\\-3\cdot3\cdot y-3\cdot4+4\cdot2\cdot y+4\cdot3=15\\\\-9\cdot y-12+8\cdot y+12=15\\\\\Big(-9\cdot y+8\cdot y\Big)+\Big(-12+12\Big)=15\\ \\\Big(-(9\cdot y- 8\cdot y)\Big)+\Big(-(12-12)\Big)=15\\\\ \Big(-(1y)\Big)=15\\\\-1y=15\\\\ y=15 : \Big(-1\Big)\\\\y=-15$