Question

Rezoolvati ecuatiile :

a) x - 4 = 2x - 15
b) 7x - 3 = 4x + 6
c) 11 - 8x = x + 2
d)35 - 7x = 3 ( 9 - x )
e) 2 ( 11 - 3x ) = 17 - x
f) 35 - 2x = 8x - 5
g)3 · ( x - 2 ) + 2 · ( 5 - x ) = 7


VA ROOOOG AM NEVOIE ASTAZI VA MULTUMESC ANTICIPAT 15 PUNCTE SI COROANA SI 5 STELE SI MULTUMESC , VA ROOOOOOOG !!!!

Answer 1

a) x-4 = 2x-15
x-2x = -15+4
-x = -11 /•(-1)
x = 11.

b) 7x-3 = 4x+6
7x-4x = 6+3
3x = 9
x = 9/3
x = 3.

d) 35-7x = 3(9-x)
35-7x = 27-3x
-7x+3x = 27-35
-4x = 8
x = 8/-4
x = -2.

c) `scuze, am încurcat c) cu d). acum o să rezolv punctul c) `
11-8x = x+2
-8x-x = 2-11
-9x = -9 /•(1)
9x = 9
x = 9/9
x = 1.

e) 2(11-3x) = 17-x
22-6x = 17-x
-6x+x = 17-22
-5x = 5
x = 5/-5
x = -1.

f) 35-2x = 8x-5
-2x-8x = -5-35
-10x = -40 /•(-1)
10x = 40
x = 40/10
x = 4.

g) 3(x-2)+2(5-x) = 7
3x-6+10-2x = 7
x+4 = 7
x = 7-4
x = 3.


Sper ca te-am ajutat :)