Question

Resolva as equações abaixo:
X+7=2

X-5=2

2x+3=5

0,3x=1

3x=6

10x-10=20

2(x-5)=7(2+x)

2x+7=3x-4​

Answer 1

a) -5
b) 7
c) 1
d) 10/3
e) 2
f) 3

Answer 2

a) x + 7 = 2

x=-7+2

x=-5

b) x-5=2

x=5+2

x=7

c) 2x=-3+5

2x=+2

x= 2/2

x= 1

d) 0,3x=1

x= 1/0,3

x= 3,333...

e) 3x=6

x=6/3

x= 2

f) 10x-10=20

10x=+10+20

10x=30

x=30/10

x= 3

g) 2(x-5)=7(2+x)

2x-10= 14+7x

2x-7x=+10+14

-5x=24

x=24/-5

h) 2x+7=3x-4

2x-3x=-7-4

-1x=-11

x= -11/-1

x= +11