Question

Rezolvati in R ecuatia:
a)2(x-1)+3(x+2)=5x+4
b)6-3(2-x)+4x=7-x
c)-1,4(5-x)+2,5(2+x)=-3,6+x
d)5+7(1-x)-5x=x-8

Answer 1

a)2x-2+3x+6=5x+4 2x+3x-5x=4+2-6 5x-5x=6-6 0x=0 b) 6-6+3x+4x=7-x 7x=7-x 8x=7 x= 7:8

Answer 2

c) -1,4*5+1,4*x+2,5*2+2,5*x=-3,6+x
-7+1,4x+5+2,5x=-3,6+x
-2+3,9x=-3,6+x
3,6x+3,9x=2
7,5x=2
x=7,5/2=3,75
d)5+7-7x-5x=x-8
12-12x=x-8
-x-12x=-12-8
-13x=-20
x=-20/-13