Question

07. Resolva as equações do 1º grau.
a) 2x=6
b)6x+1=13
c) 5x + 18 = 33
d) 4(6y + 7) = 15y - 8
e) 10x + 21 - 7 = 10 + 3x
f) 5z - 40 = 55
g) 432b + 14 - 301


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Answer 1

a) 2x = 6

x = 6/2

x = 3

b)6x+1=13

6x = 13 - 1

6x = 12

x = 12/6

x = 2

c) 5x + 18 = 33

5x = 33 - 18

5x = 15

x = 15/5

x = 3

d) 4(6y + 7) = 15y - 8

24y + 28 = 15y - 8

24y - 15y = -8 - 28

9y = 36

y = -36/9

y = -4

e) 10x + 21 - 7 = 10 + 3x

10x - 3x = 10 - 21 + 7

7x = 4

x = 4/7

f) 5z - 40 = 55

5z = 55 + 40

5z = 95

z = 95/5

x = 19

g) 432b + 14 - 301

Está incompleta