Rozwiąż równania.
a) -3(x+8)+7 = -2x +10(1-x)
b)20 - (2x+5)=1/2(x-4)-2x
c) -(5x-2)-1/6=-2/3(x + 1/4)
d) x+2/4 - x/2 = 3(x-2)/4
/ - kreska ułamkowa
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a)
-3x-24+7=-2x+10-10x
-3x+10x+2x=10+24-7
9x=27/:9
x=3
b)
20-(2x+5)=1/2(x-4)-2x
20-2x-5=1/2x-2-2x
20-5+2=1/2x-2x+2x
1/2x=17/:1/2
x=8,5