Question

Can some one help me ????????

Answer 1

$-\frac{1}{7}=-\frac{1}{2}u+\frac{2}{3}|\cdot42\\ -6=-21u+28\\ 21u=34\\ y=\frac{34}{21}$

Answer 2

$-\frac{1}{7}=-\frac{1}{2}u+\frac{2}{3}\ \ \ \ \ |multiply\ both\ sides\ by\ LCM(7;\ 2;\ 3)=42\\\\42\times(-\frac{1}{7})=42\times(-\frac{1}{2})u+42\times\frac{2}{3}\\\\-6=-21u+14\times2\ \ \ \ \ |add\ 21u\ to\ both\ sides\\\\21u-6=28\ \ \ \ \ \ |add\ 6\ to\ both\ sides\\\\21u=34\ \ \ \ \ |divide\ both\ sides\ by\ 21\\\\\boxed{u=\frac{34}{21}}$