Question

Rezolvati urmatoarele ecuatii:
a) 2(x+2)+3(x-2)-2=3(6-5x)+3-5x
b) 4(x-2)-1+2(2-3x)=5(x+2)-3(2x-5)+x
c) 5(x-3)+4(2x-5)+5(3-4x)=-7(x+2)+x+1
d) 3(x-5)+5(x-3=4(x-2)-3(x+1)-7
VA ROG FRUMOS ... AJUTATI -MA

Answer 1

a) 2x+4+3x-6-2=18-15x+3-5x
5x-4=21-20x
5x+20x=21+4
25x=25
x=25/25=1

b) 4x-8-1+4-6x=5x+10-6x+15+x
-2x-5=25
-2x=25+5
-2x=30
x= -15

c) 5x-15+8x-20+15-20x= -7x-14+x+1
-7x-20= -6x-13
-7x+6x= -13+20
-x=7
x= -7

d) 3x-15+5x-15=4x-8-3x+3-7
8x-30=x-12
8x-x= -12+30
7x=18
x=18/7

Answer 2

a) 2(x+2)+3(x-2)-2=3(6-5x)+3-5x
2x+4+3x-6-2=18-15x+3-5x
5x-4=21-20x
5x+20x=21+4
25x=25
x=25/25=1
b) 4(x-2)-1+2(2-3x)=5(x+2)-3(2x-5)+x
4x-8-1+4-6x=5x+10-6x+15+x
-2x-5=25
2x=-5-25
2x=-30
x=-30/2=-15

c) 5(x-3)+4(2x-5)+5(3-4x)=-7(x+2)+x+1
5x-15+8x-20+15-20x=-7x-14+x+1
-7x-20=-6x-13
-6x+7x=-20+13
x=-7
d) 3(x-5)+5(x-3)=4(x-2)-3(x+1)-7
3x-15+5x-15=4x-8-3x-3-7
8x-30=x-18
8x-x=-18+30
7x=12
x=12/7