Question

5. Resolva as seguintes equações:
a) 2x - 3 = 7
b) 5x + 8 = 3x - 10
c) 2. (x + 3) = x - 4
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Answer 1

A)

$\large{2x - 3 = 7}$

$\large{2x = 7 + 3}$

$\large{2x = 10}$

$\large{x = \frac{10}{2} }$

$\large \boxed{ \red{x = 5}}$

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B)

$\large{5x + 8 = 3x - 10}$

$\large{5x - 3x = - 10 - 8}$

$\large{2x = - 18}$

$\large{x = - \frac{18}{2} }$

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

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C)

$\large{2.(x + 3) = x - 4}$

$\large{2x + 6 = x - 4}$

$\large{2x - x = - 4 - 6}$

$\large \boxed{ \red{x = - 10}}$

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Att, IzabelaCristina2006 ❤️ ♈