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rezolvati ecuatiile:
1-2x=-7
5-4x=-3
1-6x=-11
1-5x=-19


Răspuns :

1+2x=-7 => 2x=8 => x=4
5-4x=-3 => 4x=8 => x=2
1-6x=-11 => 6x=12 => x=2
1-5x=-19 => 5x=20 => x=4
1-2x=-7
2x=1+7
x=8/2
x=4

5-4x=-3
4x=5+3
x=8/4
x=2

1-6x=-11
6x=-=1+11
x=12/6
x=2

1-5x=-19
5x=1+19
x=20/5
x=4