Решите уравнения:
а) 4х+4х=242(не решать)
б) 15у-8у=714
в) 9z+z=500
г) 10k-k=702
д)4l+l+l=1200
е) 6t+3t-t=6400

15y-8y=714

7y=714

y=714:7

y=102

9z+z=500

10z=500

z=500:10

x=50

10k-k=702

9k=702

k=702:9

k=78

4l+l+l=1200

6l=1200

l=1200:6

l=200

6t+3t-t=6400

8t=6400

t=6400:8

t=800