A)4x+4x= 424; b)15y-8y=714 c)9z+z=500 d)10k-k=702 e)4l+5l=1200 f)6t+3t-t=6400 !

A) 8x=424 ; x=53.
B) 7y=714; y=102.
C) 10z=500; z=50.
D)9k=702; k=78.
E) 9l=1200; l=133..
F) 8t=6400; t=800.
...

А) 4х + 4х = 424
8х = 424
х = 53
в) 15у - 8у = 714
7у = 714
у = 102
с) 92 + z = 500
10z = 500
z = 50
D) 10k - k = 702
9k = 702
k = 78
E) 4l + 5l = 12000
9l = 1200
l = 133,3
F) 6t + 3t - t = 6400
8t = 6400
t = 800