Question

Tìm x:a) 2*x-20=x+30

         b) 5*x-30+4*x=60

Answer 1

a) 2x - 20 = x + 30

2x - x = 30 + 20

x = 50

b) 5x - 30 + 4x = 60

9x = 60 + 30

9x = 90

x = 90 : 9

x = 10

Answer 2

a) 2x - 20 = x + 30

2x - x = 30 + 20

x = 50

b) 5x - 30 + 4x = 60

9x = 60 + 30

9x = 90

x = 90 : 9

x = 10

Answer 3

\(2.x-20=x+30\)

\(2.x=x+30-20\)

\(2.x=x+10\)

\(x=10\)

Answer 4

x = 10 nha bn

>_< ủng hộ mk nha các bn

Answer 5

a) 2x - 20 = x + 30

2x - x = 30 + 20

x = 50

b) 5x - 30 + 4x = 60

9x = 60 + 30

9x = 90

x = 90 : 9

x = 10