Question

1. Determine a raiz das seguintes equações:
a) 3. (2x - 3) +4.(x - 1) = -3
b) 7. (x + 1) -2.(x+5) = x + 5
c)3.(5 – x) - 3.(1 – 2x) = 42
d) 2.(2x + 3) - 2x = x + 18

me ajudem por favor preciso da resposta pra hoje ​

Answer 1

Explicação passo-a-passo:

OI, TUDO JÓIA? ツ

a)

${ \color{violet}{\boldsymbol{3(2x - 3) + 4(x - 1) = - 3}}}$

${ \color{violet}{\boldsymbol{6x - 9 + 4x - 4 = - 3}}}$

${ \color{violet}{\boldsymbol{10x - 9 - 4 = - 3}}}$

${ \color{violet}{\boldsymbol{10x - 13 = - 3}}}$

${ \color{violet}{\boldsymbol{10x = - 3 + 13}}}$

${ \color{violet}{\boldsymbol{10x = 10}}}$

${ \color{violet}{\boldsymbol{x = \frac{10}{10} }}}$

${ \color{violet}{\boldsymbol{\boxed{x = 1}}}}$

b)

${ \color{violet}{\boldsymbol{7(x + 1) - 2(x + 5) = x + 5}}}$

${ \color{violet}{\boldsymbol{7x + 7 - 2x - 10 = x + 5}}}$

${ \color{violet}{\boldsymbol{5x + 7 - 10 = x + 5}}}$

${ \color{violet}{\boldsymbol{5x - 3 = x + 5}}}$

${ \color{violet}{\boldsymbol{5x - x = 5 + 3}}}$

${ \color{violet}{\boldsymbol{4x = 8}}}$

${ \color{violet}{\boldsymbol{x = \frac{8}{4} }}}$

${ \color{violet}{\boldsymbol{\boxed{x = 2}}}}$

c)

${ \color{violet}{\boldsymbol{3(5 - x) - 3(1 - 2x) = 42}}}$

${ \color{violet}{\boldsymbol{15 - 3x - 3 + 6x = 42}}}$

${ \color{violet}{\boldsymbol{12 - 3x + 6x = 42}}}$

${ \color{violet}{\boldsymbol{12 + 3x = 42}}}$

${ \color{violet}{\boldsymbol{3x = 42 - 12}}}$

${ \color{violet}{\boldsymbol{3x = 30}}}$

${ \color{violet}{\boldsymbol{x = \frac{30}{3} }}}$

${ \color{violet}{\boldsymbol{\boxed{x = 10}}}}$

d)

${ \color{violet}{\boldsymbol{2(2x + 3) - 2x = x + 18}}}$

${ \color{violet}{\boldsymbol{4x + 6 - 2x = x + 18}}}$

${ \color{violet}{\boldsymbol{2x + 6 = x + 18}}}$

${ \color{violet}{\boldsymbol{2x - x + 6 = 18}}}$

${ \color{violet}{\boldsymbol{2x - x = 18 - 6}}}$

${ \color{violet}{\boldsymbol{\boxed{x = 12}}}}$

$\pink{ \boxed{{\mathbb{ATT: ARMANDO}}}}$