Question

Me ajudem a resolver essas equações urgente com a conta armada a)9x-2=7x+4
b)4x-2+1+x_1=0
c)6x+3.(4-x)=2x+15

Answer 1

$a)9x-2=7x+4\to \\\\ 9x-7x=4+2\to \\\\ 2x=6\to \\\\ x= \frac{6}{2} \to \\\\x=3$




$b)4x-2+1+x-1=0\to \\\\ 4x+x=2-1+1\to \\\\ 5x=2\to \\\\ x= \frac{2}{5}~ou~x=0,4$




$c)6x+3.(4-x)=2x+15\to \\\\ 6x+12-3x=2x+15\to \\\\ 6x-3x-2x=15-12\to \\\\ x=3$