Posted by Izzy. on .
I SERIOUSLY need help!
Solve the linear system by using substitution.
x=64y
2x3y=1
Explanation too, please!
Please and thanks!

Math 
Reiny,
very very easy
sub x = 64y into
2x  3y = 1
2(64y)  3y = 1
12  8y  3y = 1
11y = 11
y = 1
then x = 6  4(1) = 2 
Math 
Izzy.,
Thank you, but:
How did you go from 128y3y to 11y? 
Math 
Reiny,
12  8y  3y = 1
12  11y = 1 , that should be clear
12 12  11y = 1 12
11y = 11
divide by 11
y = 1 
Math 
Izzy.,
Understood. Thank you.