rozwiaż równanie 0.2x+0.5x+5(5x-1)-2.7x=6.5 0.3(0.4x-1,2)+0.36=0.6

0.2x+0.5x+5(5x-1)-2.7x=6.5 /*10 2x+5x+250x-50-27x=65 230x=115 /:230 x=0.5 0.3(0.4x-1.2)+0.36=0.6 0.12x-0.36+0.36=0.6 0.12x=0.6 x=5

1. 0.2x+0.5x+5(5x-1)-2.7x=6.5 0,2x + 0,5x + 25x - 5 - 2,7x = 6,5 23x - 5 = 6,5 /+5 23x = 6,5 + 5 / : 11,5 x = 11,5 2. 0.3(0.4x-1,2)+0.36=0.6 0,12x - 0,36 + 0,36 = 0,6 0,12x = 0,6 / : 0,12 x = 5