Question

2) Resolva as Equações:

a)
$x = 35 = 155$
b)
$y + 22 = 42$
c)
$y + 42 = 22$
d)
$2x - 3 = 25$
e)
$- 3x + 2 = - 7$
f)
$x + 12 = 2x - 5$

g)
$3y + 4 = - 9y + 14$
h)
$2 \times (x - 3) = 4 \times (2x + 1)$
i)
$3 - 3 \times (x - 2) = 2x - (x - 4)$


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Answer 1

Resposta:

a) x = 190 / x = 120

b) x = 20

c) y = -20

d) x = 14

e) 3 = x

f) 17 = x

g) y = 10/12

h) -10/6 = x

i) 5/4 = x

Explicação:

a) x = 35+155 / x+35 = 155

x = 190 / x = 155-35

/ x = 120

b) y+22 = 42

y = 42-22

y = 20

c) y+42 = 22

y = 22-42

y = -20

d) 2x-3 = 25

2x = 25+3

2x = 28

x = 28÷2

x = 14

e) -3x+2 = -7

2+7 = 3x

9 = 3x

9÷3 = x

3 = x

f) x+12 = 2x-5

12+5 = 2x-x

17 = x

g) 3y+4 = -9y+14

3y+9y = 14-4

12y = 10

y = 10/12

h) 2×(x-3) = 4×(2x+1)

2x-6 = 8x+4

-6-4 = 8x-2x

-10 = 6x

-10/6 = x

i)3-3×(x-2) = 2x-(x-4)

3-3x+6 = 2x-x+4

3+6-4 = 2x-x+3x

9-4 = x+3x

5 = 4x

5/4 = x