rozwiaz rownania
a) -7(x+2)+4=-3x
b) 1-kreska ulamkowa u gory 2x+5 na dole 3 =4
c)-4(1/2x-2)-4=2(-x+2)
d)2x(x-1)=2(x-1)(x+3)
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a) -7(x+2)+4=-3x
-7x-14+4=-3x
-10=-3x+7x
-10=4x /:4
x=-2,5
b) 1-kreska ulamkowa u gory 2x+5 na dole 3 =4 /× 3
1-2x+5=12
-2x=12-1-5
-2x=6 /:(-2)
x=-3
c) -4(1/2×(-2))-4=2(-x+2)
-4×(-1)-4=-2x+4
4-4=-2x+4
-4=-2x /:(-2)
x=2
d) 2x(x-1)=2(x-1)(x+3)
2x²-2x=2(x²+3x-x-3)
2x²-2x=2x²+6x-2x-6
-6x=-6 /:(-6)
x=1
a) -7(x+2)+4=-3x
-7x-14+4=-3x
-7x+3x=10
-4x=10
x=-2/5
b)1 i 2x+5/3=4
2x+8=4
2x=-4
x=-2
c)-4(1/2x-2)-4=2(-x+2)
-2x+8-4=-2x+4
0=0 sprzeczne
d)2x(x-1)=2(x-1)(x+3)
2x²-2x=2(x²+2x-3)
2x²-2x=2x²+4x-6
-6x=-6
x=1