Question

1) Resolva as equações do 1 grau.

a) 4x 2-1 = 11

b) 9x +6 = 8

c) 3x -1 = x

d) 11x +12 = 4x +13

e) x -3 = 0

f) x +5 = 11

g) 5x = 4x +12

h) 2x = 24

i) 2x = -40

j) 7x = 1

k) 9x = 5

Answer 1

a) 4x = +11 -2 +1
4x = +10
1x = +2,5

b) 9x = +8 -6
9x = +2
x = 4,5

c) 3x -1x = +1
2x = 1
x = 0,5

d) 11x -4x = +13 -12
7x = +1
x ≅ 0,143

e) 1x = 0 +3
x = 3

f) 1x = +11 -5
x = 6

g) 5x -4x = +12
× = 12

h) 2x = +24
x = 12

i) 2x = -40
x = -20

j) 7x = 1
x ≅ 0,143

k) 9x = 5
x ≅ 0, 56