Question

Resolva as equações: a) 9x = 5x + 20 b) 3x + 4 = 2x + 16 c)4x+ 15= 3x+ 35 d) 36 = x – 13​

Answer 1

Resposta:

$a) \: 9x = 5x + 20 \\ 9x - 5x = 20 \\ 4x = 20 \\ x = \frac{20}{4} \\ x = 5 \\ \\ b)3x + 4 = 2x + 16 \\ 3x - 2x = 16 - 4 \\ 1x = 12 \\ x = \frac{12}{1} \\ x = 12 \\ \\ c)4x + 15 = 3x + 35 \\ 4x - 3x = 35 - 15 \\ 1x = 20 \\ x = \frac{20}{1} \\ x = 20$

[tex] d)36 = x - 13

- x = - 13 - 36

x= -49

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-x

x=49