Question

7) Resolva as equações: a) 7x – 3 = x + 5 – 2x
b) x + 4x - 4 = 9 - 2x – 6

Answer 1

a)

$7x-3=x+5\\7x-x=5+3\\6x=8\\x=\frac{8}{6}$

b)

$x+4x-4=9-2x-6\\5x+2x=3+4\\7x=7\\x= \frac{7}{7}\\x=1$