Szczegółowe wyjaśnienie:
b) 2,7x + 0.3 = 5(0.2x - 3.2) - (1,7 - 2.3x)
7x+0.3=x-16
7x+0.3-x=-16
6x+0.3=-16
6x=-16-0.3
6x=-16.3
x=-16.3/6
x=-163/60
x=- 163/60 :2
y=2
c) 0.6x + 0.2(x - 1) = 0.2(2 - x)
0.6x+0.2x-0.2=0.2(2-x)
0.8x-0.2=0.4-0.2x
0.8x-0.2+0.2x=0.4
x-0.2=0.4
x=0.4+0.2
x=0.6
d) 0.7(x + 2) = 0.4(x + 1) + 0.3x + 1
0.7x+1.4=0.4(x+1)+0.3x+1
0.7x+1.4=0.4x+0.4+0.3x+1
0.7x+1.4=0.7x+0.4+1
0.7x+1.4=0.7x+1.4
0.7x+1.4-0.7x=1.4
1.4=1.4
x=r
