Question

giúp mình đề cuối 

Answer 1

a) x=-8

b) x=0

c) x=-8

d) x=-6+(-2)=-8

Answer 2

a) \(x+12=4\Rightarrow x=4-12\Rightarrow x=-\left(12-4\right)\Rightarrow x=-8\)

b) \(19-x=0\Rightarrow x=19-0\Rightarrow x=19\)

c) \(x-4=-12\Rightarrow x=-12+4\Rightarrow x=-\left(12-4\right)\Rightarrow x=-8\)

d) \(x-\left(-2\right)=-6\Rightarrow x+2=-6\Rightarrow x=-6-2\Rightarrow x=-6+\left(-2\right)\Rightarrow x=-8\)

Answer 3

a_) x⇒-8

b_) x⇒19

c_) x⇒-8

d_) x⇒-8