Question

Resolva as equações
a)4x+8=3x-5

b)3a-4=a+1

c)9y-11=-2

d)5x-1=8x+5

Answer 1

a) 4x + 8 = 3x - 5
4x - 3x = - 8 - 5
x = - 13

b) 3a - 4 = a + 1
3a - a = 4 + 1
2a = 5
a = 5/2 ou 2,5

c) 9y - 11 = -2
9y = 11 - 2
9y = 9
y = 9/9
y = 1

d) 5x - 1 = 8x + 5
5x - 8x = 1 + 5
- 3x = 6 (- 1)
3x = - 6
x = - 6/3
x = - 2