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a.) 3x+5= -5 Tak/Nie
3*(-4)+5=-5
-12+5=-5
-7=-5 NIE
b.) 2(2x+6)= -4 Tak/Nie
2(2*(-4)+6)=-4
2(-8+6)=-4
-16+12=-4
-4=-4 TAK
rozwiąż równania:
2a-3=a+1
2a-a=1+3
a=4
4b+3=3b-4
4b-3b=-4+3
b=-1
7+3c=-5+2c
3c-2c=-5-7
c=-12
5d+2=3d
5d-3d=-2
2d=-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
f=3/5