Question

Answer 1

a, x = -24 + 9 = -15 

b, \(\Leftrightarrow100+x-10=40\Leftrightarrow90+x=40\Leftrightarrow x=-50\)

Answer 2

Answer 3

a) x - 9 = -24

x  = (-24) + 9

x = 15

b) 100 + (x - 10) = 40

x - 10 = 40 - 100

x - 10 = -60

x = (-60) + 10

x = -50

Answer 4

x-9=24

x= -24+9

x= -15

b) 100 + (x - 10) = 40

x - 10 = 40 - 100

x - 10 = -60

x = (-60) + 10

x = -50

Answer 5

\(a,x-9=-24\)

\(\Rightarrow x=-24+9\)

\(\Rightarrow x=-15\)

\(b,100+\left(x-10\right)=40\)

\(\Rightarrow x-10=40-100\)

\(\Rightarrow x-10=-60\)

\(\Rightarrow x=-60+10\)

\(\Rightarrow x=-50\)

Answer 6

Bài 2 :

a) x - 9 = -24

            x = -15

 

Answer 7