Question

resolva as equações abaixo e ache seu conjunto solução

a)2x-7=x-17

b)3.(x+2)-5=2x+2

c)3x-2.(5-x)=x-(2-x)

Answer 1

$a)2x-7=x-17\to\\\\ 2x-x=-17+7\to\\\\ x=-10$




$b)3.(x+2)-5=2x+2\to\\\\ 3x+6-5=2x+2\to\\ \\ 3x-2x=2-6+5\to \\\\ x=1$




$c)3x-2.(5-x)=x-(2-x)\to \\\\ 3x-10+2x=x-2+x\to \\\\ 3x+2x-x-x=-2+10\to \\\\ 3x=8\to \\\\ x= \frac{8}{3}$

Answer 2

a-)2x-7 = x - 17
2x - x = -17 + 7
x = -10
====================
b-)
3x  + 6 - 5 = 2x + 2
3x + 1 = 2x + 2 
3x - 2x = 2 - 1
x = 1
====================
c-)
3x - 10 + 2x = x - 2 + x 
5x = 2x - 2 + 10
5x = 2x + 8
5x - 2x = 8
3x = 8
x = 8/3