Question

determine o valor de x
a) x + 1 += 10
b) 2x - 4 = 3 - 6 x
c) 2x + 10 = 20
d) 2 ( x + 1 ) = x + 10

Answer 1

a) x + 1 = 10
x = 10 - 1
x = 9

b) 2x - 4 = 3 - 6x
2x + 6x = 3 + 4
8x = 7
x = 7/8

c) 2x + 10 = 20
2x = 20 - 10
2x = 10
x = 10/2
x = 5

d) 2x + 2 = x + 10
2x - x = 10 - 2
x = 8