Question

if 4x+5y= 14 and x-5y =16 then find the x and y??​

Answer 1

Explanation:

• 4x+5y=14 here a1=4, b1=5, c1 =14 then x-5y=16, here a2= 1, b2 = -5, c2=16 d=a1×b2 -a2×b1=4×(-5)-1×5=-20-5=25
• dx=c1×b2-c2×b1=14×(-4)-16×5=-70-21=91
• dy=a1×c2-a2×c1=4x 16-14×1=64-14=50
• by cramers rule x=dx÷d=91 ÷25 =3.64
• y=dy÷d =50 ÷25 =2 then,
• x=3.64
• y=2

Answer 2

HEYA...

SIMPLY FIND X AND Y WITH ELIMINATION METHOD OR SUBSTITUTION METHOD ...