Question

Sa se rezolve ecuatiile:
a)5(x-7)-2x=x-41
b)7(x-9)-4x=x-39
c)4(x+5)-3(x-3)=2(x+15)
d)5(x+2)-4(x-2)=3(x+8)
e)2(15+3(x-1))=4(x+7)
f)2(4(x-2)+16)=6(x+5)
g)3(4x-3(x+5))+19=2(x-23)
h)3(5x-4(x+3))+21=2(x-17)
Va rooog d-au si coroana va rooog e urgent!!!

Answer 1

a) 5(x-7)-2x = x-41
5x-35-2x = x-41
3x-35 = x-41
3x-x = -41+35
2x = -6
x = -6/2
x = -3.

b) 7(x-9)-4x = x-39
7x-63-4x = x-39
3x-63 = x-39
3x-x = -39+63
2x = 24
x = 24/2
x = 12.

c) 4(x+5)-3(x-3) = 2(x+15)
4x+20-3x+9 = 2x+30
x+29 = 2x+30
x-2x = 30-29
-x = 1
x = -1.

d) 5(x+2)-4(x-2) = 3(x+8)
5x+10-4x-8 = 3x+24
x+2 = 3x+24
x-3x = 24-2
-2x = 22
x = -11.

e) 2[15+3(x-1)] = 4(x+7)
2(15+3x-3) = 4x+28
2(12+3x) = 4x+28
24+6x = 4x+28
6x-4x = 28-24
2x = 4
x = 2.

f) 2[4(x-2)+16] = 6(x+5)
2(4x-8+16) = 6x+30
2(4x+8) = 6x+30
8x+16 = 6x+30
8x-6x = 30-16
2x = 14
x = 7.

g) 3[4x-3(x+5)]+19 = 2(x-23)
3(4x-3x-15+19) = 2x-46
3(x+4) = 2x-46
3x+12 = 2x-46
3x-2x = -46-12
x = -58.


h) 3[5x-4(x+3)]+21 = 2(x-17)
3(5x-4x-12)+21 = 2x-34
3(x-12)+21 = 2x-34
3x-36+21 = 2x-34
3x-15 = 2x-34
3x-2x = -34+15
x = -19.




I hope I helped you :)