Matemática, perguntado por ymariaeduarda8259, 9 meses atrás

1. Resolva: a) 18x - 4 = 5x b) 9x - 2x – 16 = 3x + 2x - 4 c) 5x = -8x + 36 d) 7x – 4 = 4x + 6 e) 4(2x – 1) = 2(5x – 2) – 5 f) 7(x + 1) – 6(x - 3) = 31 g) - 3 = 2x + 10 h) 4x – 10 = 2x + 2


mauricioalves66: a) 18x - 4 = 5x
18x - 5x = +4
13x = +4
x = 4/13
x ~= 0,307

b) 9x - 2x – 16 = 3x + 2x - 4
7x - 3x - 2x = +16 - 4
2x = 12
x =12/2
x = 6

c) 5x = -8x + 36
5x + 8x = 36
13x = 36
x = 36/13
x ~= 2,769

d) 7x – 4 = 4x + 6
7x - 4x = 6 +4
3x = 10
x = 10/3
x = 3,333...

e) 4(2x – 1) = 2(5x – 2) – 5
8x - 4 = 10x - 4 - 5
8x - 10x = -4 -5 +4
-2x = -5 (-1)
2x = 5
x = 5/2
x= 2,5
mauricioalves66: f) 7(x + 1) – 6(x - 3) = 31
7x + 7 -6x - 18 = 31
x = 31 +18 - 7
x = 42

g) - 3 = 2x + 10
2x = -3 -10
x = -13/2
x = -6,5

h) 4x – 10 = 2x + 2
4x - 2x = 2 + 10
2x = 12
x = 12/2
x = 6

Soluções para a tarefa

Respondido por lucaschagas8765
0

Resposta:

263563963926925482494540

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