Question

4) Resolva as seguintes equações:

a) y+201=180
b) x-145=280
c)15x=-180
e)12x40=3x+12
f)5.(x+15)=4.(3x-8)-3
g)-6.(2x-3)=-32.x+28
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Answer 1

Resposta: a) y = 180 - 201 ; y = -21

b) x = 280 + 145 ; x = 425

c) x = -180/15 ; x = -12

e) 480 - 12 = 3x ; 368 = 3x ; x = 368/3 ; x = 122,6

f) 5x + 75 = 12x - 32 - 3 ; 75 - 35 = 12x - 5x ; 40 = 7x ; x = 40/7 = 5,71

g) -12x + 18 = -32x + 28 ; -12x + 32x = 28 - 18 ; 20x = 10 ; x = 10/20 ; x = 0,5