Question

Se se rezolve in Q :
a)x=3x-12
b)4x+16=8x
c)6x=2x-20
d)0,5x=-2(12+x)
e)7x+3=6x-4
f)x+30=4-2(x + 6)
g)x+5=-5-5(x-2)
h)8(x-7)=8-6(x+1)
i)2-2(x-3)=x+10
j)18-5x=x
k)9(2x+2)-17=-15x-7
l)7(x+1)+8=18-2(2x+3)
m)3(x+6)-15=6-2(x+1)
n)-5(x-2)-6=-10-2(2x+8)
o)4(x-2)+3=x-29

Answer 1

a) x-3x=12=> -2x=12/:(-2)<=> x=-6
b) 4x-8x=-16=> -4x=-16/×(-4)<=>x=4
c) 6x-2x=-20=> 4x=-20<=>x=-5
d) 0,5x=-24-2x=> 0,5x+2x=24<=> 2,5x=24<=> x=9,6
e) 7x-6x=-4-3=> x=-7
f) x+30=4-2x-12=> x+30=-8-2x<=> x+2x=-8-30<=> 3x=-38
g) x+5=-5-5x+10=> x+5=5-5x<=> x+5x=5-5<=> 6x=0<=> x=0
h) 8x-56=8-6x-6=> 8x-56=2-6x<=> 8x+6x=2+56<=> 14x=58<=>x=29/7
i) 2-2x+6=x+10=>8-2x=x+10<=> -2x-x=10-8<=> -3x=2<=> x=-2/3
j) -5x-x=-18=>-6x=-18<=> x=3
k) 18x+18-17=-15x-7=> 18x+1=-15x-7<=> 18x+15x=-7-1<=> 33x=-8<=> x=-8/33
l) 7x+7+8=18-4x-6=> 7x+15=12-4x<=> 7x+4x=12-15<=> 11x=-3<=> x=-3/11
m) 3x+18-15=6-2x-1=> 3x+3=5-2x<=> 3x+2x=5-3<=> 5x=2<=> x=2/5
n) -5x+10-6=-10-4x-16=> -5x+4=-26-4x<=> -5x+4x=-26-4<=> -x=-30/×(-1)<=> x=30
o) 4x-8+3=x-29=> 4x-5=x-29<=> 4x-x=-29+5<=> 3x=-24<=> x=-8
Sper ca te-am ajutat ^^