Question

me ajudem...

a) x/2 + 1-2/5 = 1/2

b) 2+3/2 + x+2/3 = -1/2

c) 3+x/2 - (1-x) = x-1/4

d) 3x-1/2 - 4x+2/4 - 2x-4/3 = x-5/6

Answer 1

a) x/2 + 1-2/5 = 1/2
x/2+3/5=1/2
(5x+6)/10=1/2
10x+12=10
10x=10-12
10x=-2
x=-2/10
x=-0,2

b) 2+3/2 + x+2/3 = -1/2
7/2+(3x+2/3)=-1/2
(21+6x+4)/6=-1/2
42x+12+8=-6
42x=-26
x=-26/42
x≈-62

c) 3+x/2 - (1-x) = x-1/4
(6+x)/2- (1-x)=x-1/4
[6+x-(2-2x)]/2= x-1/4
3x+4=x-1/4
12x+16=x-1
11x=-17
x=-17/11
x=-1,5454...

d) 3x-1/2 - 4x+2/4 - 2x-4/3 = x-5/6
[18x-6-(12x+2)-(8x-16)]/12 = x-5/6
(-2x+8)/12= x-5/6
-12x+48=12x-60
108