Question

Equação de 1 grau:

Por favor me ajudem


a) 3x+8=5x-2
b)45x+3·2=4+3
c)3x-10-8=3x-x

Answer 1

Thatay30,

a)
$3x + 8 = 5x - 2$
$3x - 5x = -2 - 8$
$-2x = -10$

$\boxed{\boxed{x = \frac{10}{2}}}$

b)
$45x +3.2 = 4 + 3$
$45x + 6 = 7$
$45x = 7 - 6$
$45x = 1$

$\boxed{\boxed{x = \frac{1}{45}}}$

c)
$3x - 10 - 8 = 3x -x$
$3x - 18 = 2x$
$3x - 2x = 18$

$\boxed{\boxed{x = 18}}}$

Answer 2

a) 3x+8=5x-2
3x-5x=-2-8
-2x=-10  (-1)
2x=10
x=10/2
x=5
b) 45x+3.2=4+3
   45x+6=4+3
45x=7-6
45x=1
x= 1/45
c)3x-10-8=3x-x
3x-3x+x=+8+10
+x=18