Question

A ) 5× - 3 + × = 2× + 9
B ) x + 2x + 3 - 5x = 4× - 9
C) 17× - 7x = x + 18

Me ajudem com essas equações por favor!!

Answer 1

Resposta:

a)

$5x - 3 + x = 2x + 9 \\ 5x + x - 2x = 9 + 3 \\ 4x = 12 \\ x = \frac{12}{4} \\ x = 3$

b)

$x + 2x + 3 - 5x = 4x - 9 \\ x + 2x - 5x - 4x = - 9 - 3 \\ - 6x = - 12 \\ 6x = 12 \\ x = \frac{12}{6} \\ x = 2$

c)

$17x - 7x = x + 18 \\ 10x - x = 18 \\ 9x = 18 \\ x = \frac{18}{9} \\ x = 2$

Answer 2

Resposta:

A) 3

B) 2

C) 2

Explicação passo-a-passo:

A) 5x - 3 + x = 2x + 9

$5x + x - 3 = 2x + 9 \\ 6x - 3 = 2x + 9 \\ 6x - 2x = 9 + 3 \\ 4x = 12 \\ x = \frac{12}{4} \\ x = 3$

B) x + 2x+ 3 - 5x= 4x-9

$3x - 5x - 4x = - 9 - 3 \\ - 6x = - 12 \\ x = \frac{ - 12}{ - 6} \\ x = 2$

C) 17x - 7x = x + 18

$10x = x + 18 \\ 10x - x = 18 \\ 9x = 18 \\ x = \frac{18}{9} \\ x = 2$