Question

           решите уравнение
  4х+4х=424
 15у-8у=714
 9z+z=500
 10k-k=702
 4l+5l+l=1200
6t+3t-t=6400

Answer 1

1)4x+4x=424
8x=424
x=424:8
x=53
2)15y-8y=714
7y=714
y=714:7
y=102
3)9z+z=500
10z=500
z=50
4)10k-k=702
9k=702
k=78
5)4l+5l+l=1200
10l=1200
l=120
6)6t+3t-t=6400
8t=6400
t=800