Question

resolva as seguintes equações

a) x+3=7
B) 2t-5=t+4
c) 9-4z-4=z+7-1
d) 16y+5-3=-2y-15
e) -x+40=4x
f) 6(t+5)=t
g) 5(y-9)-3=-8-y
h) 10-6(z-8)=9+z
i)12+2n=9(n-7)-2
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Answer 1

Resposta:

a) x+3=7 => x=7-3 => x=4

b) 2t-5=t+4 => 2t-t=4+5 => t=9

c) 9-4z-4=z+7-1 => -4z-z=7-1-9+4 => 5z=1 => z=1/5

d) 16y+5-3=-2y-15 => 16y-2y=-15-5+3 => 14y=-17 => y= -17/14

f) 6(t+5)=t => 6t=30=t => 6t-t=30 => 5t=30 => t=30/5 => t=6

e) -x+40=4x => -x-4x=-40 => -5x=-40.(-1) => x= 40/5 => x=8