Question

a, 45 - 3x = 15

b 4x - 20 = 32 

c 2x : 16 = 14

d 0 : 5x = 0

e 3240 : 9x = 18

Answer 1

a) 45 - 3x  = 15

3x = 30

x = 10

b) 4x - 20 = 32

4x = 52

x = 13

c) 2x : 16 = 14

2x = 224

x = 112

d) 0 : 5x = 0

=> x thuộc Z

e) 3240 : 9x = 18

9x = 180

x = 20

Answer 2

a,45-3x=15

-3x=-30

x=10

b,4x-20=32

4x=52

x=13

c,2x:16=14

2x=224

x=112

d,0:5x=0

5x=0

x=0

e,3240:9x=18

9x=180

x=20

=.= hok tốt!!

Answer 3

\(45-3x=15\Leftrightarrow3x=30\Leftrightarrow x=10\)

\(4x-20=32\Leftrightarrow4x=52\Leftrightarrow x=13\)

\(2x:16=14\Leftrightarrow2x=224\Leftrightarrow x=112\)

\(0:5x=0\Leftrightarrow5x=0\Leftrightarrow x=0\)

\(3240:9x=18\Leftrightarrow9x=180\Leftrightarrow x=20\)