Question

Rotunjitii la a treia zecimala solutiile urmatoarelor ecuatii:
a) 7( x+4,05) = 3x + 40,6;
b) 2( 7x - 0,15) = 6x + 11,2
c) 25,3 - 6x = 5(2x - 1,64)
d) 7,3 - 10x = ( 1,73 + 5x) 3.

Answer 1

a) 7x+28,35=3x+40,6
7x-3x=40,6-28,35
x=12,25:4
x=3,060

b) 14x-0,3=6x+11,2
8x=11,2+0,3
x=11,5:8
x=1,430

c)25,3-6x=10x-8,2
25,3+8,2=10x+6x
x=33,5:16
x=2,090

d) 7,3-10x=5,19+15x
7,3-5,19=15x+10x
x=2,11:25
x=0,085