Question

resolva as equações:
a)3(3× -1)=2(3× +2)
b) ×/5 + ×/2=7/10
c) 2(× -1)=3× +4​

Answer 1

Resposta:

a) x = 7/3

b) x = 1

c) x = -6

Explicação passo-a-passo:

a) 3(3x - 1) =2(3x + 2)

9x - 3 = 6x + 4

9x - 6x = 4 + 3

3x = 7,      x = 7/3

b) $\frac{x}{5}$ + $\frac{x}{2}$ = $\frac{7}{10}$

$\frac{2x}{10}$ + $\frac{5x}{10}$ = $\frac{7}{10}$

$\frac{7x}{10}$ = $\frac{7}{10}$

x = $\frac{7}{10}$ x $\frac{10}{7}$,    x = 1

c) 2(x - 1) = 3x + 4

2x - 2 = 3x + 4

2x - 3x = 4 +2

- x = 6

x = - 6