Question

Resolva as equações abaixo:
a) 3(x – 5) = 2(x + 25)
b) 5x – 10 = x + 34
c) x + 45 = 70
d) 8x + 25 – 12x – 61 = 0

Answer 1

a) 3(x – 5) = 2(x + 25)

3x - 15 = 2x + 50

3x - 2x = 50 + 15

x = 65

b) 5x – 10 = x + 34

5x - x = 34 + 10

4x = 44

x = 44 ÷ 4

x = 11

c) x + 45 = 70

x = 70 - 45

x = 25

d) 8x + 25 – 12x – 61 = 0

8x - 12x = 61 - 25

- 4x = 36

x = 36 ÷ (- 4)

x = - 9

Answer 2

BOA NOITE ^_^

$3(x - 5) = 2(x + 25) \\ 3x - 15 = 2x + 50 \\ 3x - 2x = 50 + 15 \\ x = \boxed{ \pink{65}}$

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$5x - 10 = x + 34 \\ 5x - x = 34+ 10 \\ 4x = 44 \\ x = \frac{44}{4} \\ x = \boxed{ \red{11}}$

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$x + 45 = 70 \\ x = 70 - 45 \\ x = \boxed{ \blue{25}}$

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$8x + 25 - 12x - 61 = 0 \\ 8x - 12x = 61 - 25 \\ - 4x = 36( - 1) \\ 4x = - 36 \\ x = \frac{ - 36}{4}$

$x = \boxed{ \red{ - 9}}$

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