Question

Rezolvatii in R ecuatiile :
a. 3(x-2)+7(2x+1)=1+5x-3(6-5x)
b. 2(3x+2)-3(4x-1)=2-3(2x-1)
c. x-(2x-5)-7(x-1)=4(3-2x)
d. 3x(x+2)+2(x-3)=(x+4)(3x-5)
e. 7-x(4x-3)-2x(5-2x)=3(x+4)
f. x(3-x)+4(2x-7)-x(3+x)=6-2x(x-4)
Cine ma ajuta si pe mine ?? Va rog ajutatima si pe mine .. Nu le am inteles

Answer 1

a) 3x-6+14x+7=1+5x-18+15x
17x+1=20x-17
20x-17x=1+17
3x=18
x=6
b) 6x+4-12x+3=2-6x+3
6x-12x+6x=2+3-4-3
0=-2 (F)
c) x-2x+5-7x+7=12-8x
-8x+8x=12-7-5
0=0
d) 3x²+6x+2x-6=3x²-5x+12x-20
8x+5x-12x=6-20
x=-14
e) 7-4x²+3x-10x+4x²=3x+12
-7x-3x=12-7
-10x=5
x=-2
f) 3x-x²+8x-28-3x-x²=6-2x²+8x
3x+8x-3x-8x=6+28
0=34 (F)