Question

Resolva as seguintes equações do 1° grau
a) -10× +2=2(4× +6)
b)9× = 7× - 12
c)2,5x - 10 = 0,5x
d)3(x -3) = 2(4x - 8)
e)2t - 4 = -2t​

Answer 1

Explicação passo-a-passo:

a) -10× +2=2(4× +6)

-10x +2 = 8x + 12

-2x = 10 (-1)

2x = -10

× = 5

b)9× = 7× - 12

2x = -12

x = 6

c)2,5x - 10 = 0,5x

2x = 10

x = 5

d)3(x -3) = 2(4x - 8)

3x -9 = 8x -16

-5x = -7 (-1)

5x = 7

x = 7÷5

e)2t - 4 = -2t

4t = 4

t = 1