Question

a)2/3*x+1/4=1/2
b)3/5*x-1/2=1/10
c)3 intregi si 1/5-2/3*x=3
d)x-12 intregi si1/2=3/4*x

Va rog!

Answer 1

a)
2X/3 + 1/4 = 1/2 |×12
8X + 3 = 6
8X = 6-3
8X = 3
X = 3/8

b)
3X/5 - 1/2 = 1 /10 |×10
6X - 5 = 1
6X = 1+5
6X = 6
X = 6:6
X = 1

c)
3 intregi 1/5 =( 3×5+1)/5 = 16/5
16/5 - 2X/3 = 3 |×15
48 - 10X = 45
10X = 48-45
10X = 3
X = 3/10

d)
12 intregi 1/2 = (12×2+1)/2 = 25/2
X - 25/2 = 3X/4 |×4
4X - 50 = 3X
4X - 3X = 50
X = 50