Question

Solve for x and y:
47x+31y = 63,31x + 47y = 15.​

Answer 1

Answer:

x=2

y=-1

Step-by-step explanation:

Add and subtract both the equation then reduce them to their lowest term

the do by substitution method

Answer 2

x = 2,y = - 1

Step-by-step explanation:

$47x+31y=63-(i)\\31x+47y=15-(ii)$

$47x+31y=63\times31\\31x+47y=15\times47\\1457x+961y=1953\\1457x+2209y=705$

After solving the equation (i) and (ii) by elimination method

$-1248y=1248\\y=-1$

put $y=-1$ in equation (i)

$47x+31y=63\\47x+31(-1)=63\\47x-31=63\\47x=63+31\\47x=94 \\x=2$