Question

A)16 - 4x + 20 = - 10x + 8 B)3(5x+4)=10(x-6)+4 C)4x/3 +5/12=7/4-6x/2

Answer 1

Explicação passo-a-passo:

Letra A) X= -6

$16 - 4x + 20 = - 10x \\ 10x - 4x = - 20 - 16 \\ 6x = - 36 \\ x = \frac{ - 36}{6} \\ x = - 6$

Letra B)

$3(5x + 4) = 10(x - 6) + 4 \\ 15x + 12 = 10x - 60 + 4 \\ 15x - 10x = 16 - 60 \\ 5x = - 44 \\ x = \frac{ - 44}{5} ou \: - 8.8$

Letra C)

$\frac{4x}{3} + \frac{5}{12} = \frac{7}{4} - \frac{6x}{2} \\ \frac{16x + 5}{12} = \frac{21 - 36x}{12}$

corta as bases

$16x + 5 = 21 - 36x \\ 36x + 16x = 21 - 5$