Question

tìm x

10 - x = -90

x + 60 = 20

Answer 1

10 - x = -90

      x = 10 - (-90)

      x  = 100

x + 60 = 20

x        =  20 - 60

x        =     -40

Answer 2

10 - x = -90

x=10-(-90)

x=100

x + 60 = 20

x=20-60

x=-40

Answer 3

10-x=-90

=>x=10-(-90)

=>x=10+90

=>x=100

x+60=20

=>x=20-60

=>x=-40

Answer 4

A} 10 - x  = -90

x = -90 - 10

x = 100

B} x + 60 = 20

x = 20 - 60

x = -40 

Answer 5

10-x=-90

x=-10-90

x=-100

*) x+60=20

x=20-60

x=-40

Answer 6

10 - X = -90

X = 10 - (-90)

X = 100

b , X + 60 = 20

X = 20 - 60

X = -40

Answer 7

A} 10 - x  = -90

x = -90 - 10

x = 100

B} x + 60 = 20

x = 20 - 60

x = -40