Odpowiedź:
1.
p(x + 2a) = 3x + 1
px + 2ap = 3x + 1
px - 3x = 1 - 2ap
x(p - 3) = 1 - 2ap
x = (1 - 2ap)/(p - 3)
2.
z = 2x/v + 2x
vz = 2x + 2xv
vz = x(2 + 2v)
x = vz/(2 + 2v)
3.
v = x/(x + 1) + 1 dla x ≠ - 1
v(x + 1) = x + x + 1
vx + v = 2x + 1
vx - 2x = 1 - v
x(v - 2) = 1 - v
x = (1 - v)/(v - 2)
4.
a/z - 1 = z + 1/x dla x ≠ 0
ax - x = zx + 1
ax - zx - x = 1
x(a - z - 1) = 1
x = 1/(a - z - 1)
