Oblicz. 5 * x 18 - 5z _____ = _________ 8 12 3x x 2x ___ + __ = ___ = 13 2 6 9 4x 5x ___ - ___ = 11 9 12

[5*x]/8=[18-5x]/12 (*24) 24[5*x]/8=24[18-5x]/12 3[5*x]=2[18-5x] 15x=35-10x 15x+10x=35 25x=35 x=35/25 x=1i2/5 3x/2+x/6=2x/9+13(*18) 18[3x/2]+18[x/6]=18[2x/9]+18[13] 27x+3x=4x+234 30x-4x=234 26x=234 x=9 4x/9-5x/12=11(*36) 36[4x/9]-36[5x/12]=36[11] 16x-15x=396 x=396