Rozwiąż równania: x + 3x = 28,4 x + 4( x - 2) +12 = 36 4x - 5 = 2x + 17,8<<

x + 3x = 28,4 4x = 28,4 /: 4 x = 7,1 x + 4( x - 2) +12 = 36 x + 4x - 8 + 12 = 36 5x = 36 + 8 - 12 5x = 32 /: 5 x = 32/5 x = 6 i 2/5 4x - 5 = 2x + 17,8 4x - 2x = 17,8 + 5 2x = 22,8 /: 2 x = 11,4

x + 3x = 28,4 4x=28,4 |:4 x=7,1 x + 4( x - 2) +12 = 36 x+4x-8+12=36 5x+4=36 |-4 5x=36-4 5x=32 |:5 x=6,4 4x - 5 = 2x + 17,8 |-2x 4x-2x-5=17,8 |+5 2x=17,8 + 5 2x=22,8 | :2 x=11,4

4x=28,4 x+4x-8+12=36 5x=36-12+8 5x=20 4x-2x=17,8+5 2x=12,8