Question

Resolva as equaçoes
a) 50-x=45
b) 30+x=80
c) 90-x=0
d) 50+x=0

presiso das respostas e as equacoes motadas!

Answer 1

a) 50-x=45 ⇒ x=50-45 ⇒ x=5
b) 30+x=80 ⇒ x=80-30 ⇒ x=50
c) 90-x=0 ⇒ x=90
d) 50+x=0 ⇒ x=-50

Answer 2

a) 50-x = 45
-x = 45 - 50
-x= -5 (* -1)
x = 5

b)  30+x=80
x  = 80 - 30
x = 50

c) 90 - x = 0
-x = -90 (* -1)
x = 90

d) 50 +x = 0
x = -50