Răspuns:
a = 7
Explicație pas cu pas:
⁶⁾-2x+⁶⁾3(x-3)+ ³⁾(x-1)/2 = ²⁾(x+1)/3 - (x+3)/6 <=>
-12x + 18x - 18 + 3x - 3 = 2x+2 - x - 3 <=>
9x-21 = x-1 <=> 9x-x = 21-1 <=> 8x = 20 =>
x = 20/8 => x = 5/4
ax -10 + 3x = 2(a-x) + 5 <=>
ax-10+3x = 2a-2x+5 <=>
ax+3x+2x = 10+5 <=>
ax+5x = 15 <=>
x(a+5) = 15 => x = 15/(a+5) =>
15/(a+5) = 5/4 =>
5(a+5) = 15·4 =>
a+5 = 3·4 => a = 12-5 =>
a = 7
