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.

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

ratio is 2 : 9

the answer is three

13.5 : 3