👤
a fost răspuns

Rezolvati ecuatiile, x ∈ Z:
a) 5x + 7 - 3(x + 4) = 6 - 3(5 - x);
b) 2[15 - 4(3x - 8)] - 7 = 3[18 - 5(2x - 3)] + 18.
Repede!!!!

Răspuns :

Adinaluca17
a) 5x+7-3x-12=6-15+3x
2x-5=3x-9
3x-2x=9-5
x=4

b) 30-24x+64-7=54-30x+45+18
87-24x=117-30x
30x-24x=117-87
6x=30
x=5

Alte intrebari