Question 328351
let width be x
length = y
2(x+y)=68
x+y=34.................1
..
x+2 new width
new length = 2y-10
2(x+2)+2(2y-10)=100
2x+4+4y-20=100
2x+4y-16=100
2x+4y=100+16
2x+4y=116
x+2y=58................2
subtract the equations
x+y-x-2y=34-58
-y=-24
y=24cm the width.
plug the value of y in equation 1
x+24=34
x=10cm the length