230+[2 mũ 4 +(x-5)]=315.2018 mũ 0 707:[(2 mũ x – )+74]=4 mũ 2 – 3 mũ 2 [(6x-12):3].32=64 (x:7+15).23=391

230+[$2^{4}$ +(x-5)]=315.$2018^{0}$ 

230+[$2^{4}$ +(x-5)]=315.1

$2^{4}$ +(x-5)=315-230

16 +(x-5)=85

x-5=85-16

x-5=69

x=69+5

x=74

(x:7+15).23=391

x:7+15=391:23

x:7+15=17

x:7=17-15

x:7=2

x=2.7

x=14

[(6x-12):3].32=64

(6x-12):3=64:32

(6x-12):3=2

6x-12=2.3

6x-12=6

6.x=6+12

6.x=18

x=18:6

x=3

707:[($2^{x}$  )+74]=4² – 3²

707:[($2^{x}$  )+74]=1

($2^{x}$  )+74=1.707

($2^{x}$  )+74=707

$2^{x}$=707-74

$2^{x}$=633 Sai