Question

calcule o valor das incógnitas sendo U=Q (vale 40 pnts)

a) x+5= 12 d) y+8= 5

b) -2a= 6 e) b/5= -4

x²= 64 f) 2x= -3

Answer 1

a) x + 5 = 12 => x = 12 - 5 => x = 7

b) - 2a = 6 => a = 6/-2 => a = - 3

c) x² = 64 => X = +/- √64 => X = +/- 8 ..( X = - 8 ..ou X = 8)

d) y + 8 = 5 => Y = 5 - 8 => Y = -3

e) b/5 = - 4 => b = -4 . 5 => b = -20

f) 2x = - 3 => X = -3/2

Espero ter ajudado