Question

a)x - 39= 79
b) x + 28= 11
c) = 21
d)= -3
e) =-10
f) 6x = 2x + 16
e) 5x + 7= 4x + 10
h) 4 (x+10) -2 (x-5) =0
i) 5 (x-3) -4 (x+2) = 2 +3 (1 - 2x)

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Answer 1

Explicação passo-a-passo:

a)x - 39= 79

x=79+39

x=118

b) x + 28= 11

x=11-28

x=-17

f) 6x = 2x + 16

6x-2x=16

4x=16

x=16/4

x=4

e) 5x + 7= 4x + 10

5x-4x=10-7

1x=3

x=3

h) 4 (x+10) -2 (x-5) =0

4x+40-2x+10=0

4x-2x=-40-10

2x=-50

x=-50/2

x=-25

i) 5 (x-3) -4 (x+2) = 2 +3 (1 - 2x)

5x-15-4x-8=2+3-6x

5x-4x+6x=2+3+15+8

7x=28

x=28/7

x=4

Answer 2

Resposta:

a) X = 118

b) X = -17

f) X = 4

e) X = 3

h) X = -3,5

i) X = 2

Explicação passo-a-passo:

a)

X - 39 = 79

X = 79 + 39 = 118

b)

X + 28 = 11

X = 11 - 28 = -17

f)

2X + 16 = 6X

16 = 6X - 2X = 4X

16 ÷ 4 = 4

e)

5X + 7 = 4X + 10

5X - 4X = X

X + 7 = 10

10 - 7 = 3

h)

4 (X + 10) -2 (X - 5) = 0

2 (2X + 5) = 0

7 + 2X = 0

0 - 7 = -7

-7 ÷ 2 = -3,5

i)

5 (X - 3) -4 (X + 2) = 2 + 3 (1 - 2X)

1 (X - 1) = 5 (1 - 2X)

X = 6 - 2X

3X = 6

6 ÷ 3 = 2