👤

1.rezolvati in Q ecuatiile :
3(x+5)-6(x-2)=4(x+2)-5(x-4)
2.a)5*[(2x+3)-2(x-1)]=[4*5(x-1)-2(4-2x)]+23
b)[3x(x+5)+2*(2x+1/2)]:7=1


Răspuns :

3 (x + 5) -6 (x-2) = 4 (x + 2) -5(x-4)
3x+15-6x+12=4x+8-5x+20
3x-6x-4x+5x=8+20-15-12
-2x=1
x=1/-2
x=-0,5