Question

a) 45 - ( 25 - x ) = 10 ; b) 12 + x = - 5 - 7; c) ( x - 1 ) +( x + 1 ) = 20

Answer 1

a: =>25-x=35

=>x=-10

b:=>12+x=-12

=>x=-24

c: =>x-1+x+1=20

=>2x=20

=>x=10

Answer 2

a)

\(45-\left(25-x\right)=10\\ 45-25+x=10\\ x=10-45+25\\ x=-10\)

b)

\(12+x=-5-7\\ x=-5-7-12\\ x=-24\)

c)

\(\left(x-1\right)+\left(x+1\right)=20\\ x-1+x+1=20\\ 2x=20\\ x=20:2\\ x=10\)

Answer 3

a: =>25-x=35

=>x=-10

b:=>12+x=-12

=>x=-24

c: =>x-1+x+1=20

=>2x=20

=>x=10

Monley.D.Luffy