1) Resolva em R as equações a seguir: a) 3 + x = 0
b) 23x + 2 = 2
c) 12 - 7 + 4x = 25
d) 5x - 3x = 30
e) 4x + 10 = 45 - 3x​

Step-by-step explanation:

a)3 +X =0(Take the 3 to the left side)

Therefore: X=-3

b)23x + 2 =2 (Take the 2 to the left side)

Therefore:23x =0

(divide 23 with 23 and divide 0 by 23)

Therefore: X= 0

c) 12- 7+ 4X = 25(Take 12 and -7 to the left side)

Therefore: 4x= 25- 12+7

Therefore: 4x= 20(Then divide 4 by 4 and then divide 20 by 4)

Therefore: X=5

d)5x -3x =30

Therefore:2x =30(divide 30 by 2)

Therefore:X=15

e)4x +10= 45-3x(Move the like terms)

Therefore:4x+3x =45-10

Therefore:7x =35(Divide 7 by 7 and then divide 7 by 35)

Therefore:X= 5.

step-by-step explanation:

my butt

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb