Iam having trouble solving this problem via elimination method.
y = -7+0
y = 1x-21

(y=-7)*-1  
y=-21+1x
-y=7
y=-21+1x
0=-14+1x>14=x
substituted to 2nd equation y=1(14)-21=-7
check -7=-7+0 >-7=-7 

A)26•2=52there are 2 sides with the same length116-52=64the other 2 side have to be half of 64 each64/2=32the width is 32b)make two sentences about these steps because your teacher knows how you write and explain things.