Question

REZOLVATI URMATOARELE ECUATII , UNDE X ESTE NR. NATURAL ? P.S. * este x = inmultire !

a) 2(3 puterea 3 + x : 2 ) = 5 * 4 puterea 2
b) 4(5puterea2+x:3)=7*2puterea4
c)3(2puterea4+x:5)=2*3puterea3
d)2(4:x+7puterea2)=4*5puterea2
e)(21:x+7puterea2):2=7*2puterea2
f)(40:x+8puterea2):3=3*2puterea3

URGENT!!!!!!!

Answer 1

2(27+x/2)=5*16
54+2x/2=80
x=26

4(25+x/3)=7*16
100+4x/3=112
4x/3=12
4x=36
x=9

3(16+x/5)=2*27
48+3x/5=54
3x/4=6
3x=24
x=8

2(4/x+49)=5*25
8/x+98=100
8/x=2
x=4

(21/x+49)/2=7*4
21/x+49=56
21/x=7
x=3

(40/x+64)/3=3*8
40/x+64=72
40x=8
x=5