Question

Determinati solutiile ecuatilor
a) 7x+4+2(x-5)=8(x+1)
b) 2(x+3)-5(2x+1)=12x-19
c)3(2x+3)+2(3x+2)=9x+4
d) 5(x-2)-2x+3(x+1)=6+7x
e) -3x+5+6(-x+1)=-4(x+6)
f) 6(x+2)-2(2x+3)+4x=36

Answer 1

a) 7x+4+2(x-5)=8(x+1)
 7x+4+2x-10=8x+8
x=14

b) 2(x+3)-5(2x+1)=12x-19
 2x+6-10x-5=12x-19
20x=20
x=1

c)3(2x+3)+2(3x+2)=9x+4
6x+9+6x+4=9x+4
3x=-9
x=-3

d) 5(x-2)-2x+3(x+1)=6+7x
 5x-10-2x+3x+3=6+7x
x=-13

e) -3x+5+6(-x+1)=-4(x+6)
 -3x+5-6x+6=-4x-24
5x=35
x=7

f) 6(x+2)-2(2x+3)+4x=36
 6x+12-4x-6+4x=36
 6x=30
x=5