Question

5ª.) Resolva as equações do 1º. Grau:
a) x + 10 = 18
b) 2x – 7 = 15
c) 3x + 2 = -1
d) 6x + 12 = 54
e) 5x – 14 = 31
f) 4x + 28 = - 24
g) 9x – 13 = 95
h) 3(m + 4) + 8 = 2 + m
i) 6x + 14 + 3x = 2x + 158 – x
j) 20x + 19 – 5x = 7x + 31 + 2z
k) 7(m – 14) + 20 = 5(m + 3) – 15
l) 11(x + 2) – 410 = 2(2x – 4) + 89


urgentee!!!!!

Answer 1

olá boa tarde

Resposta:

a) x+ 10 =18

x = 18 - 10

x = 8

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b) 2x - 7 = 15

2x = 15 + 7

2x = 22

x = 22/2

x = 11

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c) 3x = -1 -2

3x = -3

x = -1

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d) 6x = 54 - 12

6x = 42

x = 7

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e) 5x = 31 + 14

5x = 45

x = 9

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f) 4x = -24 -28

4x = -52

x = -13

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g) 9x = 95 + 13

9x = 108

x = 12

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h) 3m + 12 + 8 = 2 + m

3m + 20 = 2 + m

3m - m = 2 - 20

2m= -18

m = -9

______________________________

i) 9x + 14 = x + 158

9x - x = 158 - 14

8x = 144

x = 18

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j) 15x 19 = 7x + 31 + 2z

15x - 7x = 31 + 2z - 19

8x = 12 + 2z

x = 3/2 + 1/4z

x = 3/2 + 1/4 z , z E R

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k)

7(m−14)+20=5(m+3)−15

7m−98+20=5m+15−15

7m−78=5m

2m=78

m=78/2

m=39

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l) 11x + 22 - 410 = 4x - 8 + 89

11x - 388 = 4x + 81

11x - 4x = 81 + 388

7x = 469

x = 67

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espero ter ajudado.