Question

rezolvă ecuaţiile:
a) 2(x+1)=18
b) 3( x - 1)+1=4
c) 7(x+2)-5=44
d)10-3(x-1)=4
e) 16+24=2(2x-4)+12
f) 4.(2x+1)-3=81

vă rog ajutați-mă am nevoie, dau coroniță!

x=x
.= ori


sunt in clasa a v-a !

Answer 1

a)2x+2=18
2x=18-2
2x=16
x=16/2 =8

b)3(x-1)+1=4
3x-3+1=4
3x-2=4
3x=4+2
3x=6
x=6/3= 2

c)7(x+2)-5=44
7x+14-5=44
7x=35
x=35/7 =5
d)10-3(x-1)=4
10-3x+3=4
-3x=-9
x=-9/-3= 3

e)16+24=2(2x-4)+12
40=4x-8+12
40=4x+4
4x+4=40
4x=40-4
4x=36
x= 36/4=9

f)4(2x+1)-3=81
8x+4-3=81
8x=81-1=80
x=80/8
x=10