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b)nie
2) 4b+3=3b-4
b=-7
7+3c=-5+2c
5c=-12
c=-12/5
5d+2=3d
2d=2
d=1
6e-2=7e+5
e=-7
6f-1=f+2
5f=3
f=3/5
a)3x+7=-5
3x=-5-7
3x=-12
x=-12/3
x=-4 Tak
b)2(x+6)=-4
2x+12=-4
2x=-4-12
2x=-16
x=-16/2
x=-8 Nie
Rozwiąż równania:
4b+3=3b-4
4b-3b=-4-3
b=-7
7+3c=-5+2c
3c-2c=-5-7
c=-12
5d+2=3d
5d-3d=2
2d=2
d=2/2
d=1
6e-2=7e+5
6e-7e=5+2
-e=7
e=-7
6f-1=f+2
6f-f=2+1
5f=3/5
f=0,6