Question

помогите пж.очень надо умоляю вас помогите​

Answer 1

$\left \{ {{\frac{2z}{3}*12-\frac{5v}{4}*12=-3*12} \atop {\frac{5z}{6}*24+\frac{7v}{8}*24=6*24}} \right.\\\\\left \{ {{8z-15v=-36} \atop {20z+21v=144}} \right.\\\\\left \{ {{z=\frac{15v-36}{8} } \atop {20*\frac{15v-36}{8}+21v=144 }} \right.\\\\\left \{ {{z=\frac{15v-36}{8} } \atop {37,5v-90+21v=144}} \right.$

$\left \{ {{z=\frac{15v-36}{8} } \atop {58,5v=234}} \right.\\\\\left \{ {{v=4} \atop {z=\frac{15*4-36}{8} }} \right.\\\\\left \{ {{z=3} \atop {v=4}} \right.\\\\Otvet:\boxed{z=3;v=4}$