Question

a)(2,3-0,3)x[5,2:0,2+7(2,4x0,5-x)]=618
b)183,4-5x=74,15
c)62,05:8,5+21,4x=39,4
d)27,2x5,4-2,4x=138,48 Multumesc !!!

Answer 1

a) 2x[26+7(1,2-x)]=618
26+8,4-7x=618:2
34,4-7x=309
-7x=309-34,4
-7x=274,6      inmultim -1
7x=-274,6
x=-274,6/7
x=-39,2(285714)

b)
5x=183,4-74,15
5x=109,25
x=109,25/5
x=21,85

c)
7,3+21,4x=39,4
21,4x=39,4-7,3
21,4x=32,1
x=32,1/21,4
x=1,5

d)
146,88-2,4x=138,48
2,4x=146,88-138,48
2,4x=8,4
x=8,4/2,4
x=3,5