sabendo que U=Z , resolva as equações
a) -40 = -10x
b)3x = -45 - 2x
c) 6(x + 3) - 2(x- 5) = 20
d) -18 = 2x + 15
e) 2(x - 1) - 1 = 8
f) 2(x - 7) - 4(5 - x) = 2
Soluções para a tarefa
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a) -40 = -10x(-1) = 10x = 40 ==> x = 4
b)3x = -45 - 2x ==> 3x+2x = -45 ==> 5x = - 45 ==>x = - 9
c) 6(x+3)-2(x-5)=20=>6x+18-2x + 10 = 20 =>4x = 20-28=> 4x= -8 ==>x = - 2
d) -18 = 2x + 15 ==> 2x = - 18-15==> 2x = -33 ==> x = - 33/2
e) 2(x - 1) - 1 = 8=> 2x - 2 - 1 = 8 ==> 2x = 8+3 => 2x = 11 ==> x = 11/2
f) 2(x - 7)-4(5 - x) = 2 =>2x-14-20+2x = 2 => 4x=2+34 => 2x = 36 => x = 18
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a) -40 = -10x(-1) = 10x = 40 ==> x = 4
b)3x = -45 - 2x ==> 3x+2x = -45 ==> 5x = - 45 ==>x = - 9
c) 6(x+3)-2(x-5)=20=>6x+18-2x + 10 = 20 =>4x = 20-28=> 4x= -8 ==>x = - 2
d) -18 = 2x + 15 ==> 2x = - 18-15==> 2x = -33 ==> x = - 33/2
e) 2(x - 1) - 1 = 8=> 2x - 2 - 1 = 8 ==> 2x = 8+3 => 2x = 11 ==> x = 11/2
f) 2(x - 7)-4(5 - x) = 2 =>2x-14-20+2x = 2 => 4x=2+34 => 2x = 36 => x = 18
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