Question

Solve x/2+y=0,7/x+7y/2=10
Thanks in advance

Answer 1

$\frac{x}2+y=0.7\ \ \ \ \ \/\times(-2)\\x+\frac{7y}2=10\\\\-x-2y=-1.4\\x+3.5y=10\\---------------\\-x+x-2y+3.5y=-1.4+10\\1.5y=8.6\\y=8.6\div1.5=\frac{43}5\times\frac23=\frac{86}{15}=5\frac{11}{15}\\x=10-\frac72y=10-\frac72\times\frac{86}{15}=-10\frac1{15}$