Question

Resolva


a) 14x - 7 = 6x + 41

b) 15x - 12 = 6x + 15

C) 8x - 4 = 2x + 44

D) 15x - 8 = 4x + 47

Answer 1

Olá, tudo bem???

$a)14x-7=6x+41\\14x-7-6x=41\\8x-7=41\\8x=41+7\\8x=48\\x=\frac{48}{8} \\\textbf{x=6}\\\\b)15x - 12 = 6x + 15\\15x-12-6x=15\\9x-12=15\\9x=15+12\\9x=27\\x=\frac{27}{9} \\\textbf{x=3}\\\\c)8x - 4 = 2x + 44\\8x-4-2x=44\\6x-4=44\\6x=44+4\\6x=48\\x= \frac{48}{6} \\\textbf{x=8}\\\\d)15x - 8 = 4x + 47\\15x-8-4x=47\\11x-8=47\\11x=47+8\\11x=55\\x=\frac{55}{11} \\\textbf{x=5}$