Question

1)Rezolvati in Q,ecuatiile:

a)$a)0,5(x+ \frac{2}{9} )=0.75$
b)$\frac{3}{5} (x- \frac{1}{2})=6$
c)$0,(2)* (x-1)= \frac{1}{4}$
d)$\frac{1}{7} [x-0,(23)]= \frac{5}{14}$
e)$3,75[x-0,(3)]= \frac{5}{14}$
f)$1,(3)*(3x-0,75)= \frac{1}{3}$
g)$\frac{5}{7} [4x-0,6(3)]= \frac{10}{21}$

2)Rezolvati in Q ecuatiile:

a)$3 \frac{3}{5}x+1=2x+ \frac{9}{4}$
b)$\frac{4}{3} x+1=x+5,3$
c)$1 \frac{1}{9}x+0,5=x+6,7$
d)2x+8=x+15
e)0,(8)+3x=2x+6
f)3x+6,(2)=x+11,(4).

Va rog repede!!

Answer 1

33/5x+1=2x+9/4⇒
18x/5+1=2x+9/4⇒
18x+5/5=8x+9/4⇒
5(8x+9)=4(18x+5)⇒
40x+45=72x+20⇒
40x-72x=-45+20⇒
-32x=-25⇒
x=-25/-35

4/3x-1=x+5.3⇒
4x-3/3=x+53/10⇒
4x-3/3=10x+53/10⇒
3(10x+53)=10(4x-3)⇒
30x+159=40x-30⇒
30x-40x=-159-30⇒
-10x=-189⇒
x=-189/-10⇒x=18.9

2x+8=x+15⇒2x-x=15-8⇒x=7