Question

3(a-2)=5a
2-(x-3)=6x
1-(2x-3)+(x+5)=2
2+3(x-4)-2(x-5)=0,3

Answer 1

Oi!

a)
$3(a -2) = 5a \\ 3a - 6 = 5a \\ 3a - 5a = 6 \\ - 2a = 6 (-1) \\ 2a = - 6 \\ a = \frac{- 6}{2}\\ \boxed{a = - 3}$

b)
$2 - (x - 3) = 6x \\ 2 - x + 3 = 6x \\ - x + 5 = 6x \\ - x - 6x = - 5 \\ - 7x = - 5 (-1) \\ 7x = 5 \\ \boxed{x = \frac{7}{5}}$

c)
$1 - (2x - 3) + (x + 5) = 2 \\ 1 - 2x + 3 + x + 5 = 2 \\ - 2x + x + 1 + 3 + 5 = 2 \\ - x + 9 = 2 \\ - x = 2 - 9 \\ - x = - 7 (-1) \\ \boxed{x = 7}$

d)
$2+3(x-4)-2(x-5) = 0,3 \\ 2 + 3x - 4 - 2x + 10 = 0,3 \\ x + 8 = 0,3 \\ x = 0,3 - 8 \\ \boxed{x = - 7,7}$

Bons estudos!