Resposta:
Explicação passo-a-passo:
a) 20x - 4 = 5x
20x - 5x = 4
15x = 4
x = 4/15
b) 5( 1 - x) - 2x + 1 = - 3
5 - 5x - 2x + 1 = - 3
- 7x = - 3 - 5 - 1
- 7x = - 9 ( -1)
x = 9/7
c) 4x = - 8x + 36
4x + 8x = 36
12x = 36
x = 36/12
x = 3
d) 4( x - 3) = 2x - 5
4x - 12 = 2x - 5
4x - 2x = - 5 + 12
2x = 7
x = 7/2
bons estudos
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Resposta:
Explicação passo-a-passo:
a) 20x - 4 = 5x
20x - 5x = 4
15x = 4
x = 4/15
b) 5( 1 - x) - 2x + 1 = - 3
5 - 5x - 2x + 1 = - 3
- 7x = - 3 - 5 - 1
- 7x = - 9 ( -1)
x = 9/7
c) 4x = - 8x + 36
4x + 8x = 36
12x = 36
x = 36/12
x = 3
d) 4( x - 3) = 2x - 5
4x - 12 = 2x - 5
4x - 2x = - 5 + 12
2x = 7
x = 7/2
bons estudos