Question

7 raise to power x minus y equals to 49 and 7 raise to power x plus y equals to 343 then 6x plus 2y equals to

Answer 1

here is your answer
${7}^{x - y} = 49 = {7}^{2}$
$x - y = 2$
${7}^{x + y} = 343 = {7}^{3}$
$x + y = 3$
adding 2nd and 4th eq.
2x=5
X=5/2
putting into last eq.
y=3-5/2
$y = 1 \div 2$
now
$6x + 2y = 6(5 \div 2) + 2(1 \div 2)$
$= = 16$
hope this might help you