Răspuns :
a)x+7=19
x=19-7
x=12
b)3-x=1
x=3-1
x=2
c)2x-5=27
2x=27+5
2x=32
x=32:2
x=16
d)5x-1=3x+5
5x-1-3x=5
5x-3x=5+1
2x=5+1
2x=6
x=6:2
x=3
x=19-7
x=12
b)3-x=1
x=3-1
x=2
c)2x-5=27
2x=27+5
2x=32
x=32:2
x=16
d)5x-1=3x+5
5x-1-3x=5
5x-3x=5+1
2x=5+1
2x=6
x=6:2
x=3