Question

x-y÷5=10 ax+by+c=0 prove that 2a=bc

Answer 1

let's assume x-y/5=0
5x-y/5=0
5x-y=0
but given x-y/5=10
so 5x-y=10
equation is 5x-y-10=0
ax+by+c=0
therefore a=5,b=-1,c=-10
rtp:2a=bc
2(5)=(-1)(-10)
10=10
hence proved