Rozwiąż i sprawdź równania:
a) x+(3x-5)=7
b) 3x-(x+5)=-1
c) 2(x+1)-4x=1
d) -4x-3(2x+1)=7
x+(3x-5)=7
x+3x-5=7
4x=7+5
4x=12/:4
x=3
spr. :
3+9-5=7
3x-(x+5)=-1
3x-x-5=-1
2x=5-1
2x=4/:2
x= 2
spr.:
6-(2+5) =6-2-5=6-7=-1
2(x+1)-4x=1
2x+2-4x=1
2x-4x=1-2
-2x=-1/:(-2)
x=1/2
2(½+1)-4*½=1+2-2=3-2=1
-4x-3(2x+1)=7
-4x-6x-3=7
-4x-6x=7+3
-10x=10/:(-10)
x=-1
4 -3(-2+1)=4+6-3=10-3=7
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x+(3x-5)=7
x+3x-5=7
4x=7+5
4x=12/:4
x=3
spr. :
3+9-5=7
3x-(x+5)=-1
3x-x-5=-1
2x=5-1
2x=4/:2
x= 2
spr.:
6-(2+5) =6-2-5=6-7=-1
2(x+1)-4x=1
2x+2-4x=1
2x-4x=1-2
-2x=-1/:(-2)
x=1/2
spr.:
2(½+1)-4*½=1+2-2=3-2=1
-4x-3(2x+1)=7
-4x-6x-3=7
-4x-6x=7+3
-10x=10/:(-10)
x=-1
spr.:
4 -3(-2+1)=4+6-3=10-3=7