Question

resolva as equações, sendo U=Q
a)2x-7=8
b)5a-7=2a+2
c)4t-6=2t
d)6y+30=2y-2
e)x+1=7x-2
f)1+4(n-5)=0
g)7p+3=20+2p
h)2m-5=14-3m

urgente com conta pfvr.​

Answer 1

Resposta:

Vamos lá!

a) 2x - 7 = 8

2x = 8 + 7

2x = 15

15

---

2

X = 7.5

b) 5a-7=2a+2

5a - 2a = +2 - 7

3a = -5

a = -5

--

3

a= 1.666...

c) 4t-6=2t

4t - 2t = +6

2t = +6

6

--

2

t = 3

d) 6y+30=2y-2

+30 + 2 = 2y - 6y

32 = -4y

32/-4 = -8

y = -8