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Ajutor rezolvati in R ecuatia.
5(x-3)-2 (x-7)=7-7(2 x+6);    5(8x-1)-7(4x+1)=9-8(7-4x);



Răspuns :

5x-15-2x+14=7-14x-42
3x+14x=1+7-42
17x=-34
x=-2

b) 
40x-5-28x-7=9-56+32x
12x-32x=12+9-56
-20x=-35
x=35/20
x=7/4