12,34x-8,46x+2,64x=2620,0 если x=18; 10; 1000

1. 12,34×18-8,46×18+2,64×18=2620,0
х=18
222,13 -152,28 +47,52=681,37

2. при -х=10
12,34×10 - 8,46×10+2,64×10=2620
123,4 - 84,6+26,4=65,2

3.прих=1000
12,34×1000 -8,46×1000+2,64×1000=
12340-8460+2640=6720

4. 12,34х- 8,46х+2.64х=2620
8,72х=2620 х=2620:8,72
х=370,7