POČTÁŘ

Rovnice 4                                                                                    

Řešte rovnice a proveďte zkoušku:

1. 2. ( 5x – 6) + 4x = 2x + 2. ( 4 – 4x)                                   ( x = 1)   
2. ( 1 + 3u) . (-7) + u = 4u + 12 – ( 7 – 4u)                            ( u = -3/7)
3. 3z – 5.( 1 – 2z) = z – 4. ( 3 – 3z)                                        ( RNŘ )
4.  – ( m + 5) – ( m – 1) = 2m – 3. ( 2 + 3m)                          ( m = -2/5)
5.  -2. ( 3 – 3a) – 5a – 2 = 3a – 2. ( 4 + a)                             ( RNMŘ )
6. 2,7a – 2. ( 1,8 – 1,2a) = 3. ( 1 – 0,5a)                                ( u = 1)
7. 1,2.( u + 2) – 0,7. ( 3 – 2u) = 0,5 . ( 4 + 5,2u)                    ( RNŘ)
8. 0,8 – 2. ( x – 1,4) + 3,1x = 2,5x – 1,3. ( 2 – 2x)                 ( x = 1,55)