Question

A) (6x+9x).3=2x+3 b)3.2x-3 c)4. (X-1=2-x d) (x-3).4=(x-1)

Answer 1

A)
$(6x + 9x) \times 3 = 2x + 3 \\ 15x \times 3 = 2x + 3 \\ 45x = 2x + 3 \\ 45x - 2x = + 3$
$43x = 3 \\ x = \frac{3}{43}$

B)
$3 \times 2x - 3 \\ 6x - 3$

C)
$4 \times x - 1 = 2 - x \\ 4x + x = 2 + 1 \\ 5x = 3 \\ x = \frac{3}{5}$

D)
$(x - 3) \times 4 = (x - 1) \\ 4x - 12 = x - 1 \\ 4x - x = - 1 + 12 \\ 3x = 11$
$x = \frac{11}{3}$

Espero ter ajudado

Answer 2

A)(6x+9x).3=2x+3
(15x).3=2x+3
45x=2x+3
45x-2x=3
43x=3
x=3/43

B)3.2x-3
6x-3=0
6x=3
x=3/6 divide por 2
x=1/2

C)4(x-1)=2-x
4x-4=2-x
4x+x=2+4
5x=6
x=6/5




D)(x-3).4=x-1
4x-12=x-1
4x+x= -1+12
5x=11
x=11/5