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3(x-1)+2(x+5)=15
3x-3+2x+10=15
3x+2x=15-10+3
5x=8|÷5
x=1,6
B)
-2(1/2x+1)=3x-1/2(2x+4)
-x-2=3x-x-2
-x-3x+x=-2+2
-3x=0
C)
4x-5(x+3)=2x+4(x-1)
4x-5x-15=2x+4x-4
4x-5x-2x-4x=-4+15
-7x=9 |÷(-7)
x=-1,2
D)
1/3(6x-9)=2x-1/2(6x+8)
2x-3=2x-3x-4
2x-2x+3x=-4+3
3x=-1 |÷3
x=-1/3
Mam nadzieję że pomogłam :)