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Alecsandraa
a fost răspuns

1) -5x-30=-2x
2) -14x+81=-5x
3) 3x+7=-2x-23
4) -5x+12=-3x+68
5) -x-15= 5x+33

Răspuns :

Adrianadita18
1) -5x-30=-2x
-5x+2x=-30
-3x=-30
x=-30:(-3)
x=10
2) -14x+81=-5x
-14x+5x=-81
-9x=-81
x=-81:(-9)
x=9
3) 3x+7=-2x-23
3x+2x=-7-23
5x=-30
x=-30:5
x=-6
4) -5x+12=-3x+68
-5x+3x=-12+68
-2x=56
x=56:(-2)
x=28
5) -x-15=5x+33
-x-5x=15+33
-6x=48
x=48:(-6)
x=-8

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